McCormick Onion Powder is always made from California-grown onions. So convenient, it makes it easy to add savory richness to just about any dish ̶ from soups and sauces to vegetables, chicken and hamburgers. Onion is an important flavoring in almost every cuisine. owdered onion disperses completely and evenly into your dishes, making it perfect for soups, sauces, dips and dressings.