Try this homemade Mushroom-Onion Sauce recipe the whole family will love. Made with butter, mushrooms, butter and sweet onion. Easy step-by-step instruc…
This Mushroom-Onion Sauce relies on simple, everyday ingredients such as butter, finely chopped sweet onion and all-purpose flour. It comes together quickly and makes 4 servings, at about 184 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