Try this homemade Potato Onion Casserole recipe the whole family will love. Made with potatoes, onions, cream of mushroom soup and milk. Easy step-by-st…
This Potato Onion Casserole relies on simple, everyday ingredients such as to 5 potatoes, thinly sliced, cream of mushroom soup, milk and margarine. It comes together quickly and makes 4 servings, at about 166 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