Onion powder is dehydrated, ground onion that is commonly used as a seasoning. 
 
Onion powder brings an additional asset that makes it incredibly useful in the kitchen. It disburses evenly throughout the dish for rich, allover onion flavor. Sprinkle it into soups and stews, create creamy dips and salad dressings, perk up casseroles and vegetables, or use it as a base for rubs and marinades.