Baking Powder-Double Acting: 1 lb: C

This is Starwest's nitrogen-flushed double wall silverfoil pack. 'To leaven' means to make light; to raise. Leavening agents are responsible for the volume in most baked food products. They are responsible for expanding the air bubbles that have been mixed, creamed, kneaded or whipped into the batter. This results in a delicious recipe, with lots of volume--only as long as there are adequate air bubbles. Leaveners also contribute to a baked goods' taste, coloring and texture. Baking powder is basically a blend of acid (most commonly calcium acid phosphate or cream of tartar) and baking soda (alkali - sodium bicarbonate), creating carbon dioxide bubbles when both moistened and heated. It is known as a double acting chemical leavener -- it begins release carbon dioxide as soon as it is moistened, and again when heated in the oven. (There are single acting baking powders, but are rarely used by home bakers). Always use double acting in recipes; it is virtually the only type available in grocery stores. Baking powder does not need an acidic ingredient to release its leavening power, as baking soda does, because it contains its own; baking powder contains 30 percent baking soda and monocalcium phosphate, both of which are an acid. 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 ½ teaspoon cream of tartar and ¼ teaspoon baking soda.