Warm up with this hearty Onion Soup recipe. Made with butter, onions, flour and beef broth. Easy step-by-step instructions included.
This Onion Soup relies on simple, everyday ingredients such as butter, flour, dijon or other dark mustard and black pepper to taste. It comes together quickly and makes 4 servings, at about 314 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