Warm up with this hearty Swiss Onion Soup recipe. Made with onions, butter, milk and chicken broth. Easy step-by-step instructions included.
This Swiss Onion Soup relies on simple, everyday ingredients such as large onions, finely chopped, (125 ml) butter, (950 ml) milk and stale bread, cubed. It comes together quickly and makes 4 servings, at about 841 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