Warm up with this hearty Schuler'S Swiss Onion Soup recipe. Made with onions, butter, garlic and mustard. Easy step-by-step instructions included.
This Schuler'S Swiss Onion Soup relies on simple, everyday ingredients such as onions, thinly sliced, butter, finely chopped garlic and dry mustard. It comes together quickly and makes 4 servings, at about 1250 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