le and double-acting. Double acting acid reacts in a wet mixture with baking soda at room temperature, while slow-acting only reacts when heated.</p><p> Baking powder is used instead of yeast in some recipes to avoid fermentation flavors, and to speed the production of baked goods (as carbon dioxide gas is released quicker with an acid-base reaction). Generally, 1 tsp of baking powder is used to raise a mix of 1 cup of flour and 1 cup of liquid. If the recipe is acidic (lemon juice, citrus, buttermilk etc) 