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baking soda 和baking powder 是不一样的东东,baking powder是混合物。
Baking soda is pure sodium bicarbonate. When baking soda is combined with moisture and an acidic ingredient (e.g., yogurt, chocolate, buttermilk, honey), the resulting chemical reaction produces bubbles of carbon dioxide that expand under oven temperatures, causing baked goods to rise. The reaction begins immediately upon mixing the ingredients, so you need to bake recipes which call for baking soda immediately, or else they will fall flat!
Baking powder contains sodium bicarbonate, but it includes the acidifying agent already (cream of tartar), and also a drying agent (usually starch). Baking powder, which contains bicarbonate of soda, comes pre-mixed with the acidic ingredient for you – so all you need to add is the moisture. The acidic ingredient most often used in baking powder is cream of tartar. You can make your own baking powder: simply mix two parts cream of tartar with one part bicarbonate of soda. Baking powder has a neutral taste and is often used in recipes that have other neutral-tasting ingredients, such as milk.
经过三次的失败,今天我们终于做成功了油条,用的是baking powder。配方:plain面粉250克,5-6克baking powder(泡打粉),6克盐,鸡蛋一只。面团揉好后在常温下醒30分钟,然后在冰箱里放过夜。下星期准备做油条糍饭团。
[ 本帖最后由 Sharlene 于 2009-5-2 21:27 编辑 ] |
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