U.S. patent application number 14/599763 was filed with the patent office on 2016-07-21 for extruded protein product and methods of making.
This patent application is currently assigned to GENERAL MILLS, INC.. The applicant listed for this patent is GENERAL MILLS, INC.. Invention is credited to Joel R. Lafavor, Steven C. Robie, Goeran Walther, Kevin H. Wright.
Application Number | 20160205985 14/599763 |
Document ID | / |
Family ID | 56406786 |
Filed Date | 2016-07-21 |
United States Patent
Application |
20160205985 |
Kind Code |
A1 |
Walther; Goeran ; et
al. |
July 21, 2016 |
EXTRUDED PROTEIN PRODUCT AND METHODS OF MAKING
Abstract
The present disclosure relates to extruded protein products and
methods for producing an extruded protein product. In particular,
an extruded piece is disclosed having a high protein content and
having a desirable texture and flavor. Methods for making an
extruded piece include processing, under extrusion conditions, a
combination of a powdered protein ingredient, a protein matrix
disruptive ingredient, water, and an oil.
Inventors: |
Walther; Goeran; (Plymouth,
MN) ; Robie; Steven C.; (Plymouth, MN) ;
Wright; Kevin H.; (Crystal, MN) ; Lafavor; Joel
R.; (Minnetonka, MN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
GENERAL MILLS, INC. |
Minneapolis |
MN |
US |
|
|
Assignee: |
GENERAL MILLS, INC.
Minneapolis
MN
|
Family ID: |
56406786 |
Appl. No.: |
14/599763 |
Filed: |
January 19, 2015 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A23L 33/185 20160801;
A23J 3/26 20130101; A23P 20/10 20160801; A23P 20/105 20160801; A23P
30/20 20160801; A23J 3/16 20130101; A23P 20/11 20160801 |
International
Class: |
A23L 1/305 20060101
A23L001/305; A23L 1/00 20060101 A23L001/00; A23J 3/26 20060101
A23J003/26; A23J 3/16 20060101 A23J003/16 |
Claims
1. A composition comprising extruded pieces, the extruded pieces
comprising: a. protein in an amount of about 30% to about 90% by
weight, b. a protein matrix disruptive ingredient in an amount of
from about 5% to about 50% by weight, c. oil in an amount of from
about 2% to about 20% by weight, d. water in an amount of from
about 1.5% to about 8% by weight, and e. inclusions in an amount of
from 0% to about 50% by weight.
2. The composition of claim 1, wherein the extruded pieces comprise
a substantially non-linearly oriented protein matrix.
3. The composition of claim 1, wherein the extruded pieces have a
texture analysis measurement of from about 1000 g to about 7400 g
force.
4. The composition of claim 1, wherein the oil is substantially
uniformly distributed throughout the extruded pieces.
5. The composition of claim 1, wherein the extruded pieces have a
density of from about 0.5 g/cc to about 1.0 g/cc.
6. The composition of claim 1, wherein the extruded pieces comprise
inclusions substantially uniformly distributed throughout the
extruded pieces.
7. The composition of claim 1, wherein the extruded pieces comprise
a rough and/or uneven surface.
8. The composition of claiml, wherein the protein comprises soy
protein.
9. The composition of claim 1, wherein the protein comprises whey
protein, bean protein, pea protein, wheat protein, canola protein,
or algae protein.
10. The composition of claim 1, wherein the protein matrix
disruptive ingredient comprises a flour or a syrup.
11. The composition of claim 1, wherein the protein matrix
disruptive ingredient comprises a starch, a sugar, or a fiber.
12. The composition of claim 1, wherein the inclusions comprise
nuts, seeds, fruit, grains, or coconut.
13. The composition of claim 1, wherein the extruded pieces
comprise a sugar-based coating, a fat-based coating, or a
protein-based coating.
14. The composition of claim 1 wherein an extruded piece is adhered
with one or more edible component to form a cluster.
15. The composition of claim 14, wherein the one or more edible
component is one or more additional extruded piece.
16. A food product comprising the composition of claim 1 and food
product pieces.
17. A composition comprising particulates derived from extruded
pieces, the extruded pieces comprising: a. protein in an amount of
about 30% to about 90% by weight, b. a protein matrix disruptive
ingredient in an amount of from about 5% to about 50% by weight, c.
oil in an amount of from about 2% to about 20% by weight, d. water
in an amount of from about 1.5% to about 8% by weight, and e.
inclusions in an amount of from 0% to about 50% by weight.
18. The composition of claim 17, wherein the particulates are
coated on a food product.
19. The composition of claim 17, wherein the particulates are
formed into a food product.
20. A food product or kit comprising the composition of claim 1 as
a first food component, the food product or kit further comprising
a second food component.
21. A method of making a protein product, comprising: processing,
under extrusion conditions, a powdered protein ingredient
comprising at least 45% protein by weight of the powdered protein
ingredient and a protein matrix disruptive ingredient combined with
water and an oil to form a protein matrix composition having a
protein content of from about 10% to about 65% by weight, a
moisture content of from about 25% to about 55% by weight and an
oil content of from about 1% to about 15% by weight, and forming
the protein matrix composition into pieces to form the protein
product.
22. The method of claim 21, wherein the extrusion conditions
comprise a specific mechanical energy (SME) of from about 8 Wh/kg
to about 100 Wh/kg, a die pressure of from about 150 PSI to about
1000 PSI, and/or a die temperature of from about 200.degree. F. to
about 350.degree. F.
23. The method of claim 21, wherein the powdered protein ingredient
comprises at least a portion of the protein matrix disruptive
ingredient.
24. The method of claim 21, wherein the protein matrix disruptive
ingredient comprises a flour or a syrup.
25. The method of claim 21, wherein the protein matrix disruptive
ingredient comprises a starch, a sugar, or a fiber.
26. The method of claim 21, wherein the pieces comprise a
substantially non-linearly oriented protein matrix.
27. The method of claim 21, further comprising drying the protein
matrix composition pieces to a moisture content of from about 1.5%
to about 8% by weight to form extruded pieces.
28. The method of claim 27, wherein the extruded pieces have a
texture analysis measurement of from about 1000 g to about 7400 g
force.
29. The method of claim 27, wherein the extruded pieces have a
density of from about 0.5 g/cc to about 1.0 g/cc.
30. The method of claim 27, further comprising applying a
sugar-based or protein-based coating to the extruded pieces to form
coated pieces and drying the coated pieces.
31. The method of claim 27, further comprising applying a fat-based
coating to the extruded pieces to form coated pieces and cooling
the coated pieces.
32. The method of claim 27, further comprising comminuting the
extruded pieces to form particulates.
33. The method of claim 32, further comprising producing a food
product comprising the particulates.
34. The method of claim 32, further comprising coating a food
product with the particulates.
35. The method of claim 21, wherein the oil is substantially
uniformly distributed throughout the pieces.
36. The method of claim 21, further comprising processing
inclusions with the powdered protein ingredient, protein matrix
disruptive ingredient, water, and oil.
37. The method of claim 36, wherein the inclusions comprise nuts,
seeds, fruit, grains, or coconut.
Description
TECHNOLOGY
[0001] The present disclosure generally relates to an extruded
protein product and methods of making such a product.
BACKGROUND
[0002] High protein food products have found popularity among
consumers as a way to eat nutritionally dense foods. Consumers want
diverse ways to get increased protein into their diets. Thus, there
is a need for new high protein food products to satisfy the
increasing consumer desire for protein.
SUMMARY
[0003] Provided herein is a composition including extruded pieces.
The extruded pieces include protein in an amount of about 30% to
about 90% by weight, a protein matrix disruptive ingredient in an
amount of from about 5% to about 50% by weight, oil in an amount of
from about 2% to about 20% by weight, water in an amount of from
about 1.5% to about 8% by weight, and inclusions in an amount of
from 0% to about 50% by weight.
[0004] The extruded pieces can have a substantially non-linearly
oriented protein matrix.
[0005] In some embodiments, the extruded pieces can have a texture
analysis measurement of from about 1000 g to about 7400 g force
and/or a density of from about 0.5 g/cc to about 1.0 g/cc.
[0006] The extruded pieces can have a rough and/or uneven
surface.
[0007] The protein can include one or a combination of soy protein,
whey protein, bean protein, pea protein, wheat protein, canola
protein, or algae protein.
[0008] In some embodiments, the protein matrix disruptive
ingredient can be a flour or a syrup. In some embodiments, the
protein matrix disruptive ingredient can include a starch, a sugar,
or a fiber.
[0009] In some embodiments, the inclusions can be one or a
combination of nuts, seeds, fruit, grains, or coconut. In some
embodiments, the extruded pieces can have inclusions substantially
uniformly distributed throughout the extruded pieces.
[0010] The oil can be substantially uniformly distributed
throughout the extruded pieces.
[0011] In some embodiments, the extruded pieces can have a
sugar-based coating, a fat-based coating, or a protein-based
coating.
[0012] In some embodiments, an extruded piece can be adhered with
one or more edible component to form a cluster. In some
embodiments, an extruded piece can be adhered to one or more
additional extruded piece to form a cluster.
[0013] A food product is also provided herein. A food product
includes food product pieces and extruded pieces having protein in
an amount of about 30% to about 90% by weight, a protein matrix
disruptive ingredient in an amount of from about 5% to about 50% by
weight, oil in an amount of from about 2% to about 20% by weight,
water in an amount of from about 1.5% to about 8% by weight, and
inclusions in an amount of from 0% to about 50% by weight.
[0014] A composition is provided herein including particulates
derived from extruded pieces, where the extruded have protein in an
amount of about 30% to about 90% by weight, a protein matrix
disruptive ingredient in an amount of from about 5% to about 50% by
weight, oil in an amount of from about 2% to about 20% by weight,
water in an amount of from about 1.5% to about 8% by weight, and
inclusions in an amount of from 0% to about 50% by weight. The
particulates can be coated on a food product or formed into a food
product.
[0015] A food product or kit is provided herein. The food product
or kit includes a first food component and a second food component,
where the first food component includes extruded pieces having
protein in an amount of about 30% to about 90% by weight, a protein
matrix disruptive ingredient in an amount of from about 5% to about
50% by weight, oil in an amount of from about 2% to about 20% by
weight, water in an amount of from about 1.5% to about 8% by
weight, and inclusions in an amount of from 0% to about 50% by
weight.
[0016] A method of making a food product is also provided herein.
The method includes processing, under extrusion conditions, a
powdered protein ingredient comprising at least 45% protein by
weight of the powdered protein ingredient and a protein matrix
disruptive ingredient combined with water and an oil to form a
protein matrix composition having a protein content of from about
10% to about 65% by weight, a moisture content of from about 25% to
about 55% by weight and an oil content of from about 1% to about
15% by weight, and forming the protein matrix composition into
pieces to form the food product.
[0017] The extrusion conditions can include a specific mechanical
energy (SME) of from about 8 Wh/kg to about 100 Wh/kg, a die
pressure of from about 150 PSI to about 1000 PSI, and/or a die
temperature of from about 200.degree. F. to about 350.degree.
F.
[0018] In some embodiments, the powdered protein ingredient
includes at least a portion of the protein matrix disruptive
ingredient.
[0019] In some embodiments, the protein matrix disruptive
ingredient can be a flour or a syrup. In some embodiments, the
protein matrix disruptive ingredient can include a starch, a sugar,
or a fiber.
[0020] In some embodiments, the pieces can have a substantially
non-linearly oriented protein matrix.
[0021] The method can further include drying the protein matrix
composition pieces to a moisture content of from about 1.5% to
about 8% by weight to form extruded pieces.
[0022] In some embodiments, extruded pieces have a texture analysis
measurement of from about 1000 g to about 7400 g force, and/or a
density of from about 0.5 g/cc to about 1.0 g/cc. In some
embodiments, the oil is substantially uniformly distributed
throughout the pieces.
[0023] In some embodiments, the method can further include applying
a sugar-based or protein-based coating to the extruded pieces to
form coated pieces and drying the coated pieces.
[0024] In some embodiments, the method can further include applying
a fat-based coating to the extruded pieces to form coated pieces
and cooling the coated pieces.
[0025] In some embodiments, the method can further include
comminuting the extruded pieces to form particulates. The method
can further include producing a food product including the
particulates and/or coating a food product with the
particulates.
[0026] In some embodiments, the method can further include
processing inclusions with the powdered protein ingredient, protein
matrix disruptive ingredient, water, and oil. The inclusions can
include one or a combination of nuts, seeds, fruit, grains, or
coconut.
[0027] These and various other features and advantages will be
apparent from a reading of the following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] FIG. 1 includes macroscopic images of the surfaces of an
extruded piece according to one embodiment (FIG. 1A), a piece that
does not include oil (FIG. 1B), two commercially available textured
vegetable protein products (FIGS. 1C and 1D), and two commercially
available puffed soy protein crisps (FIGS. 1E and 1F).
[0029] FIG. 2 includes macroscopic images of cross sections of an
extruded piece according to one embodiment (FIG. 2A), a piece that
does not include oil (FIG. 2B), two commercially available textured
vegetable protein products (FIGS. 2C and 2D), and two commercially
available puffed soy protein crisps (FIGS. 2E and 2F).
[0030] FIG. 3 includes light micrographs of an extruded piece
according to one embodiment (FIG. 3A), a piece that does not
include oil (FIG. 3B), two commercially available textured
vegetable protein products (FIGS. 3C and 3D), and two commercially
available puffed soy protein crisps (FIGS. 3E and 3F).
[0031] FIG. 4 includes confocal micrographs of an extruded piece
according to one embodiment (FIG. 4A), a piece that does not
include oil (FIG. 4B), two commercially available textured
vegetable protein products (FIGS. 4C and 4D), and two commercially
available puffed soy protein crisps (FIGS. 4E and 4F).
[0032] FIG. 5 is a polarized light micrograph of an extruded piece
having inclusions according to another embodiment.
DETAILED DESCRIPTION
[0033] Extrusion technology has begun to produce protein products
that have an enjoyable texture, while reducing or eliminating the
use of animal protein. Many of these products are designed to mimic
whole or ground meat and are meant to be eaten in place of meat.
However, consumers expect an even greater variety of high protein
foods that are suitable for different eating occasions. As
described herein, a new protein product has been produced having a
high protein content and having an enjoyable texture and flavor
that is suitable for a wide variety of eating occasions.
[0034] A protein product provided herein can be a composition
comprising extruded pieces. Extruded pieces described herein
comprise protein, a protein matrix disruptive ingredient, oil, and
water. In some embodiments, extruded pieces provided herein include
inclusions.
[0035] Extruded pieces provided herein comprise protein in an
amount of about 30% to about 90% (e.g., about 50% to about 75%) by
weight protein. The amount and type of protein included in extruded
pieces described herein can be selected to produce a protein matrix
when extruded in the presence of water and an oil.
[0036] As illustrated in FIGS. 3A and 4A, an extruded piece
provided herein can have a protein matrix that is substantially
non-linearly oriented. This is in contrast to an extruded product
having a substantially linearly oriented protein matrix, such as an
extruded piece that does not contain oil, as illustrated in FIGS.
3B and 4B, or a known textured vegetable protein product, as
illustrated in FIGS. 3C, 3D, 4C, and 4D. Without being bound to
theory, it is believed that a substantially non-linearly oriented
protein matrix can contribute to a desired texture of an extruded
piece provided herein.
[0037] Protein suitable for use in an extruded piece includes
plant-based protein (e.g., soy protein, pea protein, wheat protein,
oat protein, bean protein, canola protein, lentil protein, and the
like), microbe-based protein (e.g., algae protein, bacterial
protein, and the like), fungal protein (e.g., yeast protein,
mushroom protein, and the like), and animal-based protein (e.g.,
dairy protein, egg protein, insect protein, and the like). In some
embodiments, a protein can be selected to produce a desired
characteristic. For example, soy, pea, or bean protein, or the
like, can be selected to exclude grain-based ingredients, or whey
protein can be selected to produce extruded pieces having a
crunchier texture. Other characteristics can include, for example,
GMO-free, gluten-free, soy-free, and/or allergen free. In some
embodiments, blends of proteins can be used in extruded pieces
provided herein.
[0038] Extruded pieces also comprise a protein matrix disruptive
ingredient in an amount of from about 5% to about 50% (e.g., about
15% to about 40%) by weight. As used herein, the term "protein
matrix disruptive ingredient" refers to one or a combination of a
flour (e.g., a grain flour, a legume flour, a vegetable or fruit
powder, cocoa, or the like), a starch (e.g., tapioca starch, corn
starch, a modified starch, a pregelatinized starch, or the like), a
sugar (e.g., sucrose, fructose, lactose, or the like), a fiber
(e.g., sugar cane fiber, inulin, oat fiber, pea fiber, bran, hull
fiber, or the like), a polyol (e.g., glycerol or the like), syrups
(e.g., corn syrup, tapioca syrup, honey, or the like), or the like.
Without being bound by theory, it is believed that a protein matrix
disruptive ingredient disrupts the protein matrix in an extruded
piece provided herein to contribute to a desired texture and/or
protein matrix structure of the extruded piece.
[0039] A protein matrix disruptive ingredient can be selected, for
example, in order to provide a desired nutritional profile, flavor,
sweetness, and/or texture to an extruded piece that contains the
protein matrix disruptive ingredient. For example, oat hull fiber
can be selected to produce extruded pieces having a desired fiber
content, or a syrup can be selected to adjust texture and/or taste.
In some embodiments, a protein matrix disruptive ingredient can be
selected to provide a desired characteristic for an extruded piece,
such as being grain-free, gluten-free, GMO-free, soy-free, and the
like. For example, tapioca flour or starch can be selected to
produce a grain-free extruded piece.
[0040] Extruded pieces provided herein include oil in an amount of
from about 2% to about 20% (e.g., about 2% to about 15%) by weight.
Oil in an extruded piece provided herein can be distributed
substantially uniformly throughout the piece. This is in contrast
to known textured vegetable protein products, which generally are
made from defatted or low fat ingredients and do not contain oil or
only residual amounts of oil (e.g., less than 2% by weight), or if
oil is present, it is found mainly near the surface as a surface
treatment of the textured vegetable protein. For example, oil
spraying is commonly used to topically apply seasoning or flavor to
textured vegetable protein products. The disclosed extruded pieces
also contrast to puffed protein products currently available (e.g.,
soy crisps), which generally contain substantially no oil in the
matrix.
[0041] Any edible oil is suitable for use in an extruded piece
provided herein. Preferably, an oil included in an extruded piece
is liquid at room temperature. Suitable oils include, without
limitation, canola oil, olive oil, soy oil, sunflower oil, corn
oil, and the like. An oil to be included in an extruded piece can
be selected based on, for example, nutritional profile,
compatibility with extrusion process and/or equipment, texture
and/or mouthfeel imparted to the extruded piece, and/or price.
[0042] Extruded pieces described herein include water in an amount
of from about 1.5% to about 8% (e.g., about 1.5% to about 6%) by
weight. The amount of water in an extruded piece is generally
selected in order to provide shelf stability and/or a desired
texture to the extruded piece. A lower water content can be
selected to increase shelf life of an extruded piece. In some
embodiments, a higher water content can be selected in order to
reduce the hardness of an extruded piece. Water content can also be
selected to maintain solubility of one or more ingredients, such as
an antioxidant, in an extruded piece.
[0043] In some embodiments, extruded pieces provided herein include
inclusions up to about 50% by weight. As used herein, the term
"inclusion" refers to a substantially solid edible particle. An
inclusion is visually (i.e., macroscopically) distinguishable from
the protein matrix of an extruded piece. Inclusions, when included
in an extruded piece, are substantially uniformly distributed
throughout the piece. Examples of inclusions include, without
limitation, nut pieces, whole grain pieces, seeds and/or seed
pieces, fruit pieces, coconut, confection pieces, and the like.
[0044] Additional ingredients can be included in extruded pieces
provided herein. An additional ingredient can be selected to impart
a desired nutritional profile, flavor, sweetness, texture, shelf
life, and/or visual appearance to an extruded piece, or to provide
an advantage to the production process of an extruded piece.
Examples of additional ingredients that can be included in an
extruded piece include, without limitation, flavorants, nutritive
and/or non-nutritive sweeteners, salts, colorants, antioxidants,
vitamins, and/or minerals, and the like.
[0045] Extruded pieces provided herein can have a texture analysis
measurement of from about 1000 g to about 7400 g (e.g., from about
1000 g to about 5600 g) force. As used herein, the term "texture
analysis measurement" refers to an average 50% strain force of 10
replicate measurements in g obtained from the following protocol: a
single piece is placed on the stage of a TA.HDP/us Texture Analyzer
(Texture Technologies, Massachusetts, USA) and subjected to a 50%
strain test at a speed of 2 mm/second using a 50 kg load cell and a
1 inch cylindrical stainless steel probe.
[0046] In some embodiments, extruded pieces can have a density of
from about 0.5 g/cc to about 1.0 g/cc (e.g., from about 0.7 g/cc to
about 1.0 g/cc, or about 0.8 g/cc to about 0.9 g/cc). As used
herein, density is measured by the displacement of granular sodium
chloride. About 150 cc of sodium chloride is placed in a 250 ml
graduated cylinder and tapped in a tap density analyzer 300.times..
The volume of salt is recorded to the nearest cc. The salt is then
removed from the cylinder. The salt is poured back into the
cylinder in about 10-20 cc aliquots alternating with pieces of a
known weight of extruded pieces until the volume is approximately
150 cc. The remaining salt is then placed in the cylinder. The
cylinder is again tapped 300.times. in the tap density analyzer.
The volume is recorded and the particle density of each sample is
calculated as the weight of the sample divided by the difference in
tapped volume with and without sample present.
[0047] In some embodiments, extruded pieces provided herein can
have a rough or uneven surface. A rough surface can provide a
visually interesting appearance to extruded pieces. In some
embodiments, inclusions can contribute to a rough or uneven surface
of an extruded piece.
[0048] In some embodiments, extruded pieces can have average
diameter of from about 2 mm to about 15 mm (e.g., from about 5 mm
to about 10 mm). The size of an extruded piece can be adjusted for
the desired use of the extruded piece or to provide a manufacturing
advantage. For example, the size of an extruded piece can be
adjusted to provide a desired size for eating as a stand-alone
snack. In another example, the size of an extruded piece can be
adjusted to result in a desired drying time during manufacturing.
Piece size can be adjusted using known methods, such as die size
selection, rate of extrusion, and/or cutter speed.
[0049] Extruded pieces can be produced by processing, under
extrusion conditions, a powdered protein ingredient and a protein
matrix disruptive ingredient with sufficient water and an oil to
form a protein matrix composition. As used herein, the term
"extrusion conditions" refers to subjecting components to heat,
pressure, and shear in an extruder. Extrusion conditions can
include applying sufficient specific mechanical energy (SME) (e.g.,
at least about 8 Wh/kg, or from about 10 Wh/kg to about 100 Wh/kg,
about 10 Wh/kg to about 50 Wh/kg, or from about 15 Wh/kg to about
35 Wh/kg) to produce extruded pieces having a desired protein
matrix. In some embodiments, extrusion conditions can comprise a
die temperature of at least 200.degree. F. (e.g., from about
200.degree. F. to about 350.degree. F., or from about 250.degree.
F. to about 300.degree. F.). As used herein, the term "die
temperature" refers to the temperature of a protein matrix
composition inside the die of an extruder just before exiting the
die. In some embodiments, extrusion conditions can comprise a die
pressure of at least about 150 PSI (e.g., from about 150 PSI to
about 1000 PSI, about 200 PSI to about 600 PSI, or from about 250
PSI to about 350 PSI). As used herein, the term "die pressure"
refers to the pressure a protein matrix composition is exposed to
inside the die of an extruder just before exiting the die.
[0050] A powdered protein ingredient, as used herein, is an edible
dry ingredient comprising at least 45% protein (e.g., at least 50%,
at least 70%, or at least 90%) by weight. Examples of powdered
protein ingredients include, without limitation, flours having a
protein content of at least 45% (e.g., defatted soy flour), protein
concentrates (e.g., soy protein concentrate, pea protein
concentrate, whey protein concentrate, and the like), protein
isolates (e.g., soy protein isolate, pea protein isolate, whey
protein isolate, and the like), pure proteins, and combinations
thereof. A powdered protein ingredient can be included in an amount
sufficient to produce a protein matrix composition having a protein
content of about 10% to about 65% (e.g., about 15% to about 50%)
protein by weight of the protein matrix composition.
[0051] In some embodiments, a powdered protein ingredient can
comprise a protein matrix disruptive ingredient. For example, a
protein concentrate or a protein isolate can include, for example,
starch, sugar, fiber, and/or inorganic components, and the like. In
some embodiments, all or part of the protein matrix disruptive
ingredient can be combined with powdered protein ingredient, water,
and oil as a separate ingredient.
[0052] Water and oil are combined with the powdered protein
ingredient, protein matrix disruptive ingredient, and optional
inclusions and/or other ingredients in amounts sufficient to form a
protein matrix composition having a moisture content of from about
25% to about 55% by weight and an oil content of from about 1% to
about 15% by weight. Water can be provided in any appropriate form.
For example, tap or filtered water, fruit or vegetable juice, or
the like, can be used to provide the desired moisture content. In
some embodiments, water and oil can be provided as an emulsion for
combination with the powdered protein ingredient, protein matrix
disruptive ingredient, and optional inclusions and/or other
ingredients.
[0053] It has been discovered that incorporating oil into a protein
matrix composition results in extruded pieces that have a desirable
texture and a substantially non-linear protein matrix, while the
addition of too much oil (e.g., more than 15% by weight) results in
incomplete incorporation of the oil. It has also been discovered
that too little water addition (i.e., less than about 25% by
weight) can result in oil being squeezed from the protein matrix
composition, which alters the texture of extruded pieces and/or
interferes with the proper function of extruder equipment. However,
it has also been discovered that the addition of too much water
(i.e., more than 55% by weight) can result in extruded pieces that
are harder than desired. It has further been discovered that
incorporation of water and oil into a protein matrix composition
allows for the incorporation of inclusions that are visually
distinguishable from protein matrix rather than being crushed or
degenerated during extrusion at low water and/or low or no oil
conditions such that inclusions remain visually
indistinguishable.
[0054] The amounts of oil and/or water combined with a powdered
protein ingredient and protein matrix disruptive ingredient can be
adjusted in order to result in a desired appearance and/or texture
of extruded pieces. As the amount of oil is increased, extruded
pieces generally appear rougher and have a crunchier texture. As
the amount of water is increased, extruded pieces generally appear
smoother and have a harder texture.
[0055] The amounts of oil and/or water combined with a powdered
protein ingredient and protein matrix disruptive ingredient can
also be adjusted in order to adjust the amount of shear a protein
matrix composition is subjected to. Generally, higher amounts of
water and/or oil reduce the amount of shear that a protein matrix
composition is subjected to. In some embodiments, higher water
and/or oil can be used to make extruded pieces with relatively
large inclusions.
[0056] In some embodiments, dry ingredients, such as a powdered
protein ingredient, a protein matrix disruptive ingredient,
inclusions and/or other optional components, can be combined prior
to combining with water and/or oil under extrusion conditions. In
some embodiments, components can be added stepwise or at
essentially the same time before combining under extrusion
conditions.
[0057] Extruders suitable for use in the methods provided herein
can include, for example, a single screw, twin, or triple screw
extruder, or a ring extruder. For example a co-rotating,
intermeshing, twin screw extruder can be used in a method provided
herein. Manufacturers for co-rotating twin screw extruders include,
for example, Coperion, Wenger, Clextral, Bersttorf, APV, Buhler,
and Leistritz. Manufacturers for single screw extruders include,
for example, Wenger, APV, and Buhler.
[0058] A protein matrix composition can be formed into pieces using
any suitable method to form protein matrix composition pieces. For
example, a protein matrix composition can passed through an
extrusion die and then cut in order to form pieces.
[0059] Following formation, protein matrix composition pieces are
dried to form extruded pieces using any appropriate method to reach
a moisture content of from about 1.5% to about 8% to form extrude
pieces. For example, protein matrix composition pieces can be
subjected to heated air in order to dry them to the desired
moisture content.
[0060] In some embodiments, extruded pieces provided herein can be
packaged and sold as a food product without any other components.
Such packaged extruded pieces can be intended to be eaten as a food
product alone or in combination with other food products. For
example, extruded pieces can be packaged and sold as a stand alone
snack or can be used as a topping for yogurt or oatmeal. Extruded
pieces provided herein have a texture suitable such that they need
not be further prepared for eating by, for example, heating or
soaking However, it is to be understood that an individual may
enjoy heating and/or soaking extruded pieces provided herein during
various eating occasions, such as when combined with oatmeal.
[0061] In some embodiments, extruded pieces provided herein can be
combined with other food components to produce a food product. For
example, extruded pieces can be combined with food product pieces,
such as ready to eat (RTE) cereal pieces or popcorn, to produce a
food product having desired protein content. In another example,
extruded pieces can be combined with dried fruit and/or nuts to
produce a snack mix type product or a granola type product.
[0062] In some embodiments, extruded pieces provided herein can be
packaged into a kit with other food products. For example, extruded
pieces can be combined as a kit with yogurt, which can be combined
prior to eating.
[0063] In some embodiments, an extruded piece can be adhered with
one or more edible component, such as another extruded piece, nut
pieces, fresh or dried fruit pieces, seeds, coconut, grain, and the
like, to form a cluster. An extruded piece and one or more edible
component can be adhered to each other using any appropriate method
and ingredients (e.g., edible binders and the like). For example, a
cluster can be produced using a combination of an extruded piece
and rolled oats adhered using a honey-based binder or slurry.
Clusters can be provided as a food product alone or as part of a
food product, such as a snack mix, ready to eat cereal, or oatmeal
mix.
[0064] In some embodiments, extruded pieces provided herein can be
comminuted into particulates (i.e., having an average diameter of
less than 2 mm) to produce a composition derived from extruded
pieces that resembles crumbs or a powder. Such particulates can be
used, for example, to coat food products, such as ready to eat
cereal pieces, snack food pieces, and the like. In some
embodiments, particulates derived from extruded pieces provided
herein can be combined with other components and formed into a food
product, such as ready to eat cereal pieces, snack food pieces,
baked goods, and the like. In some embodiments, particulates
derived from extruded pieces disclosed herein can be used in
addition to, or to partially or completely replace, protein
ingredients, such as soy protein concentrate, in other food
products where a high protein content is desired.
[0065] It is to be understood that extruded pieces provided herein
can be used for either sweet or savory applications. Extruded
pieces disclosed herein can provide a benefit of being a high
protein stand-alone food product or provide added protein in
combination with other components in food products while also
providing an improved flavor and/or texture over other known high
protein pieces, such as textured vegetable protein or puffed
protein crisps.
EXAMPLES
Example 1
[0066] Formulations including soy protein isolate (SPI), flour (F),
sugar (S), oil (O), water (W), and flavor (R) according to Table 1
(SPI, F, S, and R are shown as % weight of dry ingredients and O
and W are shown as % weight of protein matrix composition) were
combined in a Buhler BCTL-42 extruder (Buhler Inc., Minnesota, USA)
to form a protein matrix composition. The protein matrix
composition was extruded through a single hole die having a
diameter of 1.59 mm and cut to form protein matrix composition
pieces approximately 5 mm to 10 mm. The pieces were dried using
tray dryer to a moisture content of about 1.5% to about 8% to form
extruded pieces.
TABLE-US-00001 TABLE 1 Die SME Die temp. press. Sample SPI F S O W
R (Wh/kg) (.degree. F.) (PSI) 1 75 20 4 5.4 59.8 0.6 9.6 248 152 2
75 20 4 6.5 50.4 0.6 15.4 253 199 3 75 20 4 7.8 40.4 0.6 24.6 265
297 4 75 20 4 9.0 30.7 0.6 27.9 274 330 5 75 20 4 0 33.7 0.6 82.6
313 810 6 75 20 4 3.5 56.6 0.6 14.9 257 193 7 75 20 4 4.4 46.7 0.6
17.1 262 273 8 75 20 4 5.2 36.6 0.6 24.5 275 411 9 75 20 4 1.8 37.9
0.6 32.1 284 506 10 75 20 4 1.5 48.2 0.6 20.0 275 320 11 75 20 4
1.2 58.0 0.6 14.5 259 213 12 65 30 4 6.5 50.1 0.6 12.6 256 194 13
65 30 4 7.8 40.3 0.6 18.3 263 294 14 65 30 4 9.0 30.7 0.6 19.9 274
305 15 65 30 4 5.9 27.6 0.6 23.9 282 377 16 65 30 4 5.6 31.8 0.6
23.1 282 412 17 65 30 4 4.8 41.7 0.6 19.9 272 337 18 65 30 4 1.6
43.0 0.6 25.1 275 370 19 65 30 4 1.9 33.1 0.6 46.2 288 547 20 65 30
4 2.1 2 0.6 47.8 291 571
[0067] Formulations were attempted using 25% moisture or less, but
oil separated during extrusion.
[0068] Extruded pieces were eaten to determine acceptability of
texture for consumption without further preparation (Table 2).
Extruded pieces produced using a protein matrix composition having
55% moisture or greater were identified as having an unacceptable
hardness when consumed. In addition, extruded pieces produced using
a protein matrix composition having 55% moisture or greater
exhibited a smooth, even surface. Extruded pieces produced using a
protein matrix composition having no added oil resembled TVP and
were relatively hard.
[0069] The protein content in extruded pieces from each of the
samples was measured (as % weight) using the Dumas method. Overall
fat content (as % weight) was measured by gas chromatography.
Moisture content of extruded pieces was also measured by subjecting
the extruded pieces to a vacuum oven at 70.degree. C. for 16 hours.
Protein, fat, and moisture content are shown in Table 2.
TABLE-US-00002 TABLE 2 Measured Acceptable protein (% Measured fat
Moisture (% texture for Sample wt) (% wt) wt) consumption 1 58.5
13.2 6.7 No 2 61.4 13.9 2.3 Yes 3 61.9 13.4 1.9 Yes 4 61.6 12.3 2.9
Yes 5 65.7 1.9 7.8 No (TVP-like) 6 63.6 10.7 3.7 No 7 63.6 9.5 4.0
Yes 8 63.4 10.6 4.2 Yes 9 67.9 6.3 2.3 Yes 10 67.4 4.9 2.9 Yes 11
67.4 5.0 3.8 No 12 55.7 14.6 2.1 Yes 13 54.7 13.1 4.0 Yes 14 53.8
12.1 4.0 Yes 15 56.3 9.0 4.6 Yes 16 56.7 9.4 3.8 Yes 17 57.0 10.1
3.2 Yes 18 59.9 5.7 3.5 Yes 19 60.5 4.3 3.0 Yes 20 60.6 4.4 3.4
Yes
[0070] Texture analysis measurements were obtained for extruded
pieces from each sample. Extruded pieces from each sample
individually placed on the stage of a TA.HDPlus Texture Analyzer
(Texture Technologies, Massachusetts, USA) and subjected to a 50%
strain test at a speed of 2 mm/second using a 50 kg load cell and a
1 inch cylindrical stainless steel probe The average 50% strain
force of 10 replicates determined that acceptable extruded pieces
identified in Table 1 had texture analysis measurements from about
400 g to about 6600 g force, with texture analysis measurements
greater than about 1000 g force being more preferred. Texture
analysis measurements taken for a variety of commercially available
textured vegetable protein (TVP) products, sold as meat analog,
substitute, or imitation, ranged from about 7400 g to about 9000 g
force, while a variety of commercially available soy crisps ranged
from about 1300 g to about 1400 g force. Many available TVP
products are considered to be too hard to be enjoyable to eat
without soaking in a liquid first.
[0071] Particle density measurements were obtained for extruded
pieces from each sample. Extruded pieces from each sample were
analyzed for density by the displacement of granular sodium
chloride. Briefly, about 150 cc of sodium chloride was placed in a
250 ml graduated cylinder and tapped in a tap density analyzer
300.times.. The volume of salt was recorded to the nearest cc. The
salt was then removed from the cylinder. The salt was poured back
into the cylinder in about 10-20 cc aliquots alternating with
pieces of a known weight of sample until the volume was
approximately 150 cc. The remaining salt was then placed in the
cylinder. The cylinder was again tapped 300.times. in the tap
density analyzer. The volume was recorded and the particle density
of each sample was calculated as the weight of the sample divided
by the difference in tapped volume with and without sample present.
The average particle density for acceptable extruded pieces (see,
Table 1) ranged from about 0.7 g/cc to about 1.0 g/cc, with
densities from about 0.8 g/cc to about 0.9 g/cc being more
preferred. Densities of a variety of TVP products ranged from about
0.7 g/cc to about 0.8 g/cc, while commercially available soy crisps
ranged from about 0.4 g/cc to about 0.5 g/cc. Thus, while
acceptable extruded pieces had a similar density to commercially
available TVP products, texture was somewhat reduced to result in a
product that provides a better eating experience than a TVP product
without prior hydration.
[0072] Macroscopic and microscopic images of Sample 16 (Table 1),
Sample 5, which contains no added oil (Table 1), two commercially
available TVP products, and two commercially available protein
(soy) crisps were taken to examine the structure of each sample.
The surface of extruded pieces were imaged using an Epson .RTM.
V700 (Epson America Inc., California, USA) photographic scanner.
Pieces were also sectioned using a razor blade and the interior of
pieces were also imaged using an Epson V700 photographic scanner.
FIG. 1 shows macroscopic images of the surfaces of representative
pieces of each sample, while FIG. 2 shows macroscopic images of the
interiors of representative pieces of each sample, with 1A and 2A
being Sample 16, 1B and 2B being Sample 5, 1C and 2C being a first
TVP product, 1D and 2D being a second TVP product, 1E and 2E being
a first protein crisp, and 1F and 2F being a second protein
crisp.
[0073] Extruded pieces were prepared for transmitted light
microscopy by hydrating pieces from each sample in a refrigerated
50:50 mixture of Tissue-Tek.RTM. O.C.T.TM. (Sakura Finetek Europe
B.V., The Netherlands) and water until the center was hydrated.
Once rehydrated, pieces were frozen and then cut into 20 micron
sections using a cryostatic microtome. The sections were stained
using 0.1% Ponceau 2R, which stains protein red, and an aqueous
iodine solution, which stains starch blue. The sections were imaged
using an Olympus.RTM. AX70 Microscope light microscope with a
20.times. objective and Olympus.RTM. DP70 digital camera with a
10.times. eyepiece (Olympus America Inc., Pennsylvania, USA). FIG.
3 compares light micrographs of an example of an extruded piece
(Sample 16 from Table 1; FIG. 3A), a piece containing no oil
(Sample 5 from Table 1; FIG. 3B), two commercially available TVP
products (FIGS. 3C and 3D), and two commercially available soy
crisps (FIGS. 3E and 3F). Sample 16 (FIG. 3A) had relatively large
agglomerations of non-linearly oriented protein surrounded by
protein matrix disruptive ingredient (starch in this example) in a
loosely packed structure. This contrasts to Sample 5 (FIG. 3B),
which had linearly-oriented protein with protein matrix disruptive
ingredient dispersed in spaces between protein strands.
Commercially available TVP products (FIGS. 3C and 3D) appeared
similar in structure to Sample 5, with linearly oriented protein.
Without being bound to theory, it is believed that the similar,
linearly oriented protein structure of the commercially available
TVP products to Sample 5 is, in part, due to absence of any
significant amount of oil during extrusion. Commercially available
soy crisps (FIGS. 3E and 3F) showed agglomerations of protein that
are smaller and more tightly packed compared to Sample 16 (FIG.
3A).
[0074] Extruded pieces were prepared for confocal microscopy by
cross-sectioning representative pieces from each sample with a
razor blade. Autofluorescence of at the cut surface was imaged
using an Olympus Fluoview 1000 confocal microscope with a 4.times.
objective and 425-475 nm, 500-530 nm, and 560-660 nm emission
filters after excitation at 405 nm, 488 nm, and 568 nm lasers,
respectively. The images in FIG. 4 are z-stacks of 10 micron
optical sections, with imaged stacks from each laser overlaid. It
was observed that the TVP samples autofluoresced under the 568 nm
laser, but the other samples did not. Thus, images for the TVP
samples (4C and 4D) include overlays of images obtained using
excitation at 405 nm, 488 nm, and 568 nm, while images for Sample
16 (4A), Sample 5 (4B), and commercially available protein crisps
(4E and 4F) include overlays of images obtained using excitation at
405 nm and 488 nm.
Example 2
[0075] Extruded pieces including a protein matrix disruptive
ingredient comprising insoluble fiber (e.g., oat hull fiber), were
produced. Formulations including soy protein isolate (SPI), flour
(F), insoluble fiber (IF), sugar (S), oil (O), water (W), and
flavor (R) according to Table 3 (SPI, F, IF, S, and R are shown as
% weight of dry ingredients and O and W are shown as % weight of
protein matrix composition) were combined to form a protein matrix
composition, formed, and dried similarly to Example 1.
TABLE-US-00003 TABLE 3 SME Die Die Sam- (Wh/ temp. press. ple SPI F
IF S R W O kg) (.degree. F.) (PSI) 1 55.4 20.0 20.0 4.0 0.6 43.0
4.7 29.8 274 300 2 55.4 20.0 20.0 4.0 0.6 40.9 8.9 23.0 270 242 3
55.4 20.0 20.0 4.0 0.6 48.9 7.8 16.1 261 194 4 45.4 20.0 30.0 4.0
0.6 48.6 7.8 17.3 256 201 5 45.4 20.0 30.0 4.0 0.6 36.4 9.7 31.4
271 291 6 45.4 20.0 30.0 4.0 0.6 36.4 9.7 29.9 273 287 7 35.4 20.0
40.0 4.0 0.6 34.2 10.0 34.8 280 313
[0076] Extruded pieces surprisingly incorporated the insoluble
fiber without compromising the texture or flavor of the pieces.
Extruded pieces including relatively high amounts of fiber could be
used in various food products to increase protein and/or fiber
content while providing an enjoyable eating experience.
Example 3
[0077] Extruded pieces having almond inclusions were produced.
Formulations including soy protein isolate (SPI), flour (F),
inclusions (I), sugar (S), oil (O), water (W), and flavor (R)
according to Table 4 (SPI, F, I, S, and R are shown as % weight of
dry ingredients and O and W are shown as % weight of protein matrix
composition) were combined to form a protein matrix composition,
formed, and dried similarly to Example 1. It is noted that the
amount of oil includes the amount contributed by both the almond
inclusions and added oil.
TABLE-US-00004 TABLE 4 SME Die Die Sam- (Wh/ temp. press. ple SPI F
S R I W O kg) (.degree. F.) (PSI) 1 65.4 30.0 4.0 0.6 12.3 31.5
12.0 27.9 273 348 2 65.4 30.0 4.0 0.6 11.6 35.5 11.3 26.5 266 325 3
65.4 30.0 4.0 0.6 10.8 39.9 10.5 23.8 261 287
[0078] Extruded pieces had an acceptable texture and
macroscopically identifiable almond pieces.
[0079] Samples were prepared for polarized light microscopy using
the same hydration procedure and equipment as for the light
microscopy in Example 1, except the microscope was equipped with
polarizing filters and first order red plate, and a
10.times.objective with a 10.times. eyepiece. As shown in FIG. 5,
polarized light microscopy showed relatively large agglomerations
of non-linearly oriented protein surrounded by protein matrix
disruptive ingredient in a loosely packed structure similar to
Sample 16 in Example 1. In addition, nut inclusions and bran are
identifiable, as shown in FIG. 5.
Example 4
[0080] Additional extruded pieces were produced that included a
powdered protein ingredient comprising a combination of soy protein
isolate and whey protein using a protocol similar to Example 1. The
extruded pieces had an acceptable texture, but were slightly
cripsier than the acceptable samples in Example 1. Extruded pieces
comprising whey protein can be used to produce food products where
a crispier texture is desired.
[0081] Additional samples were also produced using a protocol
similar to Example 1 and included a protein matrix disruptive
ingredient that comprised apple powder (10% by weight dry
ingredients), cinnamon (1.5-2% by weight dry ingredients), or cocoa
powder (1.5-2% by weight dry ingredients). The extruded pieces were
determined to have an acceptable texture. The samples that included
apple flakes had a light color and an apple flavor. The samples
that included cocoa were brown in color. Oat flour and rice flour
were also tested as protein matrix disruptive ingredients, and both
produced acceptable extruded pieces.
[0082] Additional inclusions were also tested, including dried
cranberry pieces, rolled oats, whole sweet corn, coconut, flax
seed, and chia seed. All of the tested inclusions resulted in
extruded pieces with macroscopically visible inclusions.
[0083] The implementations described above and other
implementations are within the scope of the following claims. One
skilled in the art will appreciate that the present disclosure can
be practiced with embodiments other than those disclosed. The
disclosed embodiments are presented for purposes of illustration
and not limitation.
* * * * *