How does double-acting baking powder work?

Double-acting baking powder is a leavening agent designed to release carbon dioxide in two distinct stages, ensuring consistent rise in baked goods.12

• First Stage: During the initial mixing and makeup stages, the baking powder releases a small amount of gas as the ingredients are combined.12
• Second Stage: The mixture remains relatively inert until the heat of the oven raises the temperature of the batter, triggering the release of the remaining gas.12

This dual-action process is highly effective because it prevents the excessive loss of leavening gas that can occur if a batter must sit for an extended period before baking. Unlike single-acting baking powders, which release all their gas at room temperature and require immediate baking, the double-acting variety provides greater stability and flexibility for the baker.12