Try this homemade Grammy's Mashed Potato Casserole recipe the whole family will love. Made with garlic salt, pepper, sour cream and baking potatoes. Eas…
This Grammy's Mashed Potato Casserole relies on simple, everyday ingredients such as garlic salt, pepper, sour cream and baking potatoes. It comes together quickly and makes 4 servings, at about 221 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