Cocoa powder andcocoa butterdon't really expire, either, but they could go stale & flavorless if improperly stored. Unfortunately, unless it smells really weird, the only way to tell if a chocolate is expired is to taste it (and spit it out, if needed). That's why proper chocolate sto...
Does Baking Powder Expire? Just like its powdered leavening “cousin”, baking powder does not live forever. And exactly like sodium bicarbonate, it is also very sensitive to moisture and humidity. So if it is kept properly in a dry and cool area, its lifespan may be six to twelve months...