How to Caramelize Onions the Right Way

Fully caramelized onions should be soft and deep-golden brown. Either use the onions immediately or keep them on hand to add deep flavor to dishes at a later date (they should keep in the refrigerator for at least a week). We utilize these robustly savory-sweet onions in quick french onion soup; to add interest to burgers, hot dogs, and sandwiches; or on top of pasta and pizza, but their uses are nearly endless.