Onion powder is dehydrated, ground onion that is commonly used as a seasoning. It is a common ingredient in seasoned salt and spice mixes, such as beau monde seasoning. Some varieties are prepared using toasted onion. White, yellow and red onions may be used.

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.