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How Baking Works Chapter 11 - Leavening Agents
Food Science - Science Olympiad
21
Other
Not Applicable
01/27/2013

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Term
An example of a physical means of adding air to baked goods is
Definition
sifting dry ingredients or whipping cake batter.
Term
Which of the following is such a powerful leavening agent that it takes up about 1600 times more space when it is heated?
Definition
Steam
Term
For best volume, gas expansion should be properly timed with
Definition
the setting of cell walls by structure builders.
Term
As products bake in the oven, the number of air cells typically
Definition
stays the same.
Term
As products bake in the oven, the size of air cells typically
Definition
increases.
Term
An example of an alkali commonly used in baked goods is
Definition
baking soda.
Term
Carbon dioxide is produced from
Definition
the fermentation of sugars by yeast & the reaction of baking soda with an acid.
Term
Yeast fermentation is the breakdown of
Definition
sugars by yeast to carbon dioxide, alcohol, energy, and other components that provide flavor.
Term
If compressed yeast is added directly into dough, there is the chance that it will
Definition
not be evenly distributed throughout.
Term
The best yeast to use when fermentation time is short is
Definition
instant.
Term
To generate sufficient carbon dioxide for leavening baked goods, baking soda needs
Definition
acid and moisture.
Term
Which of the following is not a source of acid and therefore will not react with baking soda to produce carbon dioxide?
Definition
Granulated sugar
Term
Each and every baked good is at least partly leavened by
Definition
air and steam.
Term
Baking powder contains
Definition
baking soda, one or more acids, and cornstarch.
Term
All baking powders
Definition
give off about the same amount of carbon dioxide.
Term
A double-acting baking powder
Definition
acts by releasing some carbon dioxide in the presence of moisture, the rest in the presence of heat.
Term
One reason doubling the amount of baking powder in baking powder biscuits does not double the volume of the biscuits is because
Definition
doubling the amount of baking powder does not double the amount of the other leavening gases in the biscuits.
Term
Baking ammonia (ammonium bicarbonate) is best used in
Definition
small, dry cookies, crackers, or cream puffs.
Term
Fast-acting baking powders are
Definition
less bench tolerant than slow-acting ones.
Term
Describe in words what happens in the oven to cause baked goods to rise and then not to collapse.
Definition
Leavening occurs in the oven as gases expand from the heat of the oven, pushing on wet, flexible cell walls, causing them to stretch. As long as this is approximately timed with the coagulation of proteins and the gelatinization of starch granules, this expanded volume will be “set,” even when the product cools and the gases contract.
Term
Why might a formula for chocolate cake contain both baking powder and baking soda?
Definition
A formula for chocolate cake might contain both baking powder and baking soda for the following reason: the baking powder would provide the bulk of leavening. The baking soda would increase pH, thus increasing the rich chocolate color, mellowing the flavor, and tenderizing the cake’s crumb. Additionally, the baking soda might combine with acid from the chocolate or cocoa (if not dutched), providing some additional leavening.
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