Onion powder can’t replace onions in the kitchen, but onion powder definitely has its place, like in recipes for dry rubs and taco seasonings. Plus, o... See morenion powder has a long shelf life, so it’s always ready to be substituted in when needed. Fast, flavorful, and always “no tears” when you use it, onion powder is a key ingredient in the kitchen. Find out all about it! Watch the video, then see a top-rated video for taco seasoning.