Baking powder has been a staple in American kitchens. Baking powder is a fast-acting replacement for yeast. It works by acid-alkaline reaction when the dry powder mixes with the liquid in the batter, creating bubbles. These air bubbles expand and lighten the mixture which we bake as pancakes, muffins and quick breads such as pumpkin, banana, zucchini bread… even quick eggnog bread at Christmas, and avocado bread just because we can.