onion salt or onion powder
Onion powder retains many of the sulfur compounds and antioxidants present in fresh onions, including quercetin and organosulfur compounds. Onion salt is sodium-rich, providing approximately 300–400 mg of sodium per teaspoon due to its salt content.
About
Onion powder is a dehydrated seasoning made from pulverized onions (Allium cepa), often blended with anti-caking agents such as silicon dioxide. The ingredient is produced by drying fresh onions—typically yellow, white, or red varieties—and grinding them into a fine powder that concentrates the pungent, slightly sweet onion flavor. Onion salt is a related preparation that combines onion powder with salt as the primary carrier, typically in a 3:1 to 4:1 ratio of salt to onion solids. Both products are shelf-stable, free-flowing seasonings designed to provide onion flavor without the moisture and bulk of fresh onions.
Culinary Uses
Onion powder and onion salt are used extensively in dry rubs, seasoning blends, salad dressings, and spice mixtures across American, Mexican, and international cuisines. They are particularly valued in dishes where fresh onions would add unwanted moisture or bulk, such as burger seasoning, barbecue rubs, soup mixes, and potato dishes. Onion powder dissolves readily into sauces, gravies, and dry preparations, while onion salt serves a dual function as both flavoring and seasoning agent. Both forms are common in commercial spice blends and home cooking, though onion powder offers greater versatility when sodium content needs to be controlled.