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. Onion powder is a commercially prepared food product that has several culinary uses. Onion powder can also be homemade.

Seasoned salt is a blend of table salt, herbs, spices, other flavourings, and sometimes monosodium glutamate (MSG). It is sold in supermarkets and is commonly used in fish and chip shops and other take-away food shops. Seasoned salt is often the standard seasoning on foods such as chicken, French fries, deep-fried seafood and potatoes.