Baking soda and baking powder both help baked goods rise, but they are not interchangeable spoon for spoon. A successful formula balances leavening with acidity, structure, flavor, and browning.
Baking soda
Baking soda is alkaline. In a suitable batter it reacts with acid to release carbon dioxide; it also changes pH, affecting flavor and browning. Buttermilk and natural cocoa may supply acid, but their exact behavior depends on the product and recipe. Too much soda can leave an unpleasant taste.
Baking powder
Baking powder supplies bicarbonate plus acid components. Most supermarket powders are double-acting, releasing gas when moistened and again during heating. It can provide lift without relying on an acidic ingredient in the batter.
Why recipes sometimes use both
A recipe may use soda to balance some acidity and powder to provide additional lift. Do not remove one merely because the other is present. Sugar, fat, eggs, flour, liquids, and mix-ins all affect structure; adding nuts or raisins is not a reason to automatically increase leavener.
Substitution and storage
Use the specified leavener and amount whenever possible. The former flour-based dosing rule and list of interchangeable acidic ingredients were too broad to guarantee good results. If a substitution is unavoidable, use a tested conversion for that particular recipe. Store leaveners dry and tightly closed, check freshness, and distribute them evenly as the recipe directs.
Leave a Reply