BAKING SODA/POWDER These are classified as leavening agents. They are also very important ingredients in cake making as these serve as rising agents. Baking soda is pure sodium bicarbonate and it begins to act immediately upon mixing the ingredients, so recipes that call for baking soda needs to be baked immediately as failure to do this will result in a flat cake. Baking powder comprises of sodium bicarbonate, the acidifying agent, and also a drying agent (usually starch e-g corn-starch). It is readily available as single-acting baking powder and double-acting baking powder. The single-acting powders are activated by moisture, so recipes which include this product must be baked immediately after mixing. Double-acting powders on the other hand react in two phases and can stand for a while before baking. In double-acting powders, gases are released at room temperature when the powder is added to the cake mixture, but most of the gas is released after the tempe...
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