can condensed onion soup

Canned condensed onion soup is a shelf-stable, concentrated soup product typically consisting of onions, water, beef or chicken broth, cornstarch, and seasonings (salt, pepper, garlic, thyme) sealed in a metal can. The product emerged in the mid-20th century as part of the convenience foods movement, particularly popularized in North American home cooking. The onions are pre-cooked, dehydrated, or finely minced and combined with a thickening agent and flavoring compounds, then processed and canned using retort sterilization to ensure long shelf stability. The resulting liquid concentrate contains concentrated onion flavor and umami from beef broth base, requiring dilution with water, milk, or broth before consumption as soup, or use as a cooking ingredient without dilution.

The most well-known brand is Campbell's Cream of Onion Soup, which represents the standard formulation found across most manufacturers. Regional variations exist, with some versions incorporating French onion soup characteristics or additional herbs.

Condensed onion soup functions primarily as a kitchen shortcut and flavor enhancer rather than a standalone soup. It is extensively used as a binding agent and seasoning base in casseroles, particularly the iconic green bean casserole, as well as in pot roasts, stews, and braised dishes where its umami-rich broth contributes depth. The product also serves as a base for quick soups when diluted, dips when combined with sour cream or cream cheese, and a flavoring component in gravies and sauces. In international adaptations, it appears in French onion soup shortcuts and various meat preparations across North American and Australian home cooking traditions. The concentration allows cooks to achieve savory, caramelized onion flavor without extended cooking times.