What function does baking soda serve in recipes?

• A. It acts as a preservative
• B. It serves as a leavening agent, helping baked goods rise
• C. It enhances flavor only
• D. It adds moisture

Answer: (B)

Baking soda is primarily used as a leavening agent in recipes, which means it helps baked goods to rise. When baking soda (sodium bicarbonate) is combined with an acidic ingredient, it undergoes a chemical reaction that produces carbon dioxide gas. This gas forms bubbles in the batter or dough, which causes it to expand and rise during baking, resulting in a light and porous texture in the final product.

The effectiveness of baking soda relies on the presence of an acid, such as buttermilk, vinegar, or lemon juice, which activates the leavening process. This is distinct from simply acting as a preservative, enhancing flavor, or adding moisture; while baking soda can have minor roles in these areas, its primary and most impactful function in recipes is to provide leavening. This unique ability to create lift and texture is what makes it a crucial ingredient in many baked goods.