Warm up with this hearty Belgian Onion Soup recipe. Made with butter, olive oil, onions and garlic. Easy step-by-step instructions included.
This Belgian Onion Soup relies on simple, everyday ingredients such as butter, of extra virgin olive oil, of garlic, minced and shallots, sliced thin. It comes together quickly and makes 4 servings, at about 423 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