Leavening Agent is any substance that makes a baked ...

Commercial baking powders have about a one-year shelf life, if stored sealed in a cool, dry place. High altitudes will also affect the amount of baking powder needed in a recipe. Atmospheric pressure affects the reaction of carbon dioxide. Air pressure is lower at higher altitudes, the carbon dioxide expands more; and thus, less baking powder is needed. If you do not cut back, the texture will ... ................
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