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- Baking powder is a chemical leavening agent that is a combination of baking soda, plus an acid such as cream of tartar, plus a moisture absorber such as cornstarch.
- In the presence of heat and moisture, the baking powder reacts to form carbon dioxide gas in a baked product to make it rise.
- The most common type of baking powder is double-acting baking powder. Double-acting baking powder produces gas twice:
- During mixing when baking powder gets wet
- During baking when the heat completes the reaction.
- Store baking powder tightly covered in a dry place. Baking powder stays fresh for about one year. Check the container for the expiration date.
- Substitute for 1 teaspoon baking powder: Combine 1/2 teaspoon cream of tartar and 1/4 teaspoon baking soda.
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