FLOUR 1 Flashcards

1
Q

what is milling

A

process of grinding endosperm into a fine powder

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2
Q

what are the five steps of milling

A

breaking, purifying, reducing, sifting, classifying

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3
Q

whats removed in breaking

A

break rollers remove germ and bran

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4
Q

whats the result of breaking

A

“break flour”— still some bran attached

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5
Q

how is flour moved through purifying

A

through container of blowing air to remove any remaining bran

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6
Q

whats the result of flour

A

middlings

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7
Q

what do rollers do during reducing

A

grind the middlings into flour

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8
Q

how does sifting work

A

sifted into streams of various particle size

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9
Q

how are particle sizes classified

A

by size

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10
Q

what happens to bran and germ portions in whole grain flours after step 2 in milling (purification)?

A

blended back into endosperm portion, but sometimes the whole grain is just milled

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11
Q

what is wet milling

A

grains are soaked in water to soften the seed and
make it easier to separate the components (no mechanical breaking)

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12
Q

whats an example of wet milling

A

corn kernels often wet milled to make corn starch

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13
Q

whats the most common flour

A

wheat flour

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14
Q

why is flour important

A

foundation for all baked products, and used as a thickening agent

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15
Q

can you make flour from non-cereal sources

A

yes - nuts, soybeans, potatoes

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16
Q

how are wheat flours classified

A

based on protein content

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17
Q

describe protein and starch content of soft flours

A

least amount of protein/highest amount starch
(Ideal for tender, fine crumb of cakes and pastries, pastry flour, cake flour)

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18
Q

describe protein and starch content of hard flours

A

higher protein content
(ideal for yeast breads and pasta - Whole wheat flour, durum wheat flour, bread flour)

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19
Q

what does starch provide

A

structure, texture, and flavor - Strengthens baked item through gelatinization

20
Q

starch contributes to the strength of the crumb of products. whats the crumb?

A

the cell structure w/in the interior of a baked product

21
Q

describe air bubbles in fine crumb

A

small, densely packed air bubbles

22
Q

describe air bubbles in coarse crumb

A

large, often irregular air holes

23
Q

what is whole wheat flour made from

A

entire kernel + high in fiber

24
Q

why are the coarse bran granules in whole wheat flour a drawback?

A

bran’s coarse granules break gluten strands and decrease breads final volume

25
Q

how does bread using only whole wheat flour feel + how do you fix this

A

dense/heavy, but fixed by combining with soft flour (50/50)

26
Q

why do whole wheat flours require refrigeration

A

to prevent rancidity because of germ

27
Q

what does white flour contain

A

endosperm only

28
Q

what kind of flour is bread flour made from

A

white flour from winter wheat -High gluten content (12-14%)

29
Q

what kind of flour is durum flour (Seminola)

A

hard winter durum wheat

30
Q

why is durum flour / seminola ideal for pasta

A

Highest protein content (up to 18%)

31
Q

what are the protein in durum flour / seminola held together by

A

hydrophobic interactions, disulfide bonds, and hydrogen bonds

32
Q

what does the protein in durum flour / seminola keep dough from doing

A

dough from breaking when kneading or boiling

33
Q

what is all-purpose flour a blend of

A

blend of hard and soft wheat, sp suitable for breads, cakes, or pastry

34
Q

whats the protein content of all-purpose flour

A

average is ~10% but differs by region (north vs south U.S.) and by brand

35
Q

whats pastry flour made from

A

patent flour from soft wheat + used by commercial and professional bakers

36
Q

describe protein content of pastry flour

A

lower in protein (9%)

37
Q

whats cake flour made from

A

patent flour from soft wheat
– Fine crumb, delicate structure, and smooth texture

38
Q

describe protein content of cake flour

A

similar protein content to pastry (8%), but more starch

39
Q

whats rye flour gluten content

A

lower gluten content than wheat, makes very compact breads (ex: pumpernickel)

40
Q

how are rye breads made into porous and light breads

A

because w heat flours often added (1:4 ratio wheat to rye) to rye flour

41
Q

what are pentosans

A

water-soluble carbs that rye flour contains a high concentration of

42
Q

what do pentosans do

A

increase water binding capacity and stickiness of rye bread

43
Q

whats tritical a combination of

A

wheat and rye grains

44
Q

what are examples of gluten free flours

A

amaranth, buckwheat, cornmeal, rice flour

45
Q

whats the major protein in cornmeal

A

zein— cannot mimic
elastic properties of gluten

46
Q

what are some grain free flours

A

potato flour, chickpea flour, soy flour, almond flour, coconut flour