Try this homemade Mashed Potato Casserole recipe the whole family will love. Made with potatoes, milk, margarine and onions. Easy step-by-step instructi…
This Mashed Potato Casserole relies on simple, everyday ingredients such as medium potatoes, milk, margarine or ½ cup butter and medium onions, chopped. It comes together quickly and makes 4 servings, at about 500 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.
Updated Jun 30, 2026