Baking powder is used to increase the volume and lighten the texture of baked goods. It works by releasing carbon dioxide gas into a batter or dough through an acid–base reaction, causing bubbles in the wet mixture to expand and thus leavening the mixture.
Bob's Red Mill baking soda is made from the deposits of mineralized sodium bicarbonate. It is extracted by an all-natural water process that uses no chemicals. Mix it with an acidic ingredient like buttermilk and watch your dough rise! Baking Soda is naturally aluminum free.