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Chemical Raising Agents Chemical raising agents, unlike their biological counterparts, work quickly and do not require time for fermentation. The most common chemical leaveners are baking powder and baking soda. Baking soda, or sodium bicarbonate, needs an acidic component (like buttermilk or vinegar) to activate, creating carbon dioxide gas. On the other hand, baking powder contains both an acid and a base and is ready to work when mixed with liquid. There are two types of baking powder single-acting and double-acting. Single-acting baking powder releases gas as soon as it is moistened, while double-acting baking powder does so in two phases—once when wet and again when heated. This characteristic makes double-acting baking powder particularly popular in recipes that require baking in a preheated oven.
raising agents in food
