(full-fat or skim) Sour Cream whisked together with ⅓ cup milk ½ cup sour cream whisked together with ½ cup milk Crème Fraợche ẵ cup crốme fraợche whisked together with ẵ cup milk SUBSTITUTING BAKING SODA FOR BAKING POWDER B aking soda is sodium bicarbonate It reacts with liquid acids immediately upon contact to produce carbon dioxide Carbon dioxide gets trapped within batters and expands upon baking, leavening your pancakes and other quick breads Because baking soda reacts immediately, quick breads made with it must be baked or cooked right after mixing And because of its alkalinity, baking soda can also hasten browning reactions, adding color (and thus flavor) to things like pancakes, cookies, and muffins Baking powder is sodium bicarbonate mixed with one or more of the powdered acids and a starch It does not require another acid to activate it As mentioned earlier, most baking powders are “double-acting,” meaning they produce carbon dioxide once upon coming in contact with moisture and then again when heated Because of this, baking powder–leavened goods are generally lighter and fluffier than those made with baking soda alone This doesn’t mean, however, that you can let a baking powder batter just sit around, expecting the second batch of bubbles to all the leavening—the initial reaction is vitally important to the texture of your baked goods, and so these batters should be baked right away too Don’t have baking powder on hand? It’s quite simple to substitute with your own homemade mixture of baking soda, cornstarch, and cream of tartar For every teaspoon of baking powder, use ẳ teaspoon baking soda, ẵ teaspoon cream of tartar, and ¼ teaspoon cornstarch But do bear in mind that your homemade mixture will not be double-acting, requiring you to be extra quick about getting your pancakes onto the griddle or your zucchini bread in the oven after mixing the batter ... batter just sit around, expecting the second batch of bubbles to all the leavening? ?the initial reaction is vitally important to the texture of your baked goods, and so these batters should be baked... But do bear in mind that your homemade mixture will not be double-acting, requiring you to be extra quick about getting your pancakes onto the griddle or your zucchini bread in the oven after mixing the batter... color (and thus flavor) to things like pancakes, cookies, and muffins Baking powder is sodium bicarbonate mixed with one or more of the powdered acids and a starch It does not require another