Baking powder is a leavening agent commonly used in baking to help baked goods rise. It's a dry chemical leavening agent that typically consists of a mixture of baking soda (sodium bicarbonate), an acid (such as cream of tartar), and a moisture-absorbing agent (such as cornstarch).
Baking powder is combined with liquid and exposed to heat during baking, it produces carbon dioxide gas. This gas forms bubbles in the batter or dough, causing it to expand and rise. This process creates a light and fluffy texture in baked goods.
Baking powder is a key ingredient in a wide range of baked goods, including cakes, muffins, biscuits, pancakes, and quick breads. It's a pantry staple in most kitchens and is readily available in supermarkets.