Warm up with this hearty Baked Onion Soup recipe. Made with onion soup, bread, Swiss cheese and Parmesan cheese. Easy step-by-step instructions included.
This Baked Onion Soup relies on simple, everyday ingredients such as (13 oz.) can onion soup, swiss cheese, parmesan cheese and butter. It comes together quickly and makes 4 servings, at about 121 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
It works as a light main on its own or as a starter alongside crusty bread, and it's just as good for a cozy night in as it is for feeding a crowd. Leftovers keep well, so it's a smart choice for meal prep too.
Updated Jun 30, 2026