Try this homemade Cape Cod Mashed Potato Casserole recipe the whole family will love. Made with potatoes, sour cream, cottage cheese and onion. Easy ste…
This Cape Cod Mashed Potato Casserole relies on simple, everyday ingredients such as medium sized potatoes, sour cream, cottage cheese and grated onion. It comes together quickly and makes 4 servings, at about 577 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