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Grandma's Mashed Potato Casserole in a black baking dish.

Grandma's Mashed Potato Casserole

Jenn Allen
A delightfully easy recipe that's so much more than just mashed potatoes in a baking dish. Loaded with flavor, Grandma's Mashed Potato Casserole is super creamy and oh-so good! Perfect with ham, roasts, grilled meats, and more.
3 from 2 votes
Prep Time 10 minutes
Cook Time 20 minutes
Total Time 30 minutes
Course Side Dish
Cuisine American
Servings 8 servings
Calories 195 kcal

Ingredients
  

  • 1 box instant mashed potatoes  6.6-ounce box with 2 pouches
  • ¾ cup sour cream
  • 1 cup cottage cheese
  • 2 tablespoons fresh chives chopped
  • ½ teaspoon onion powder
  • ½ teaspoon garlic powder
  • 3 tablespoons butter divided

Instructions
 

  • Preheat your oven to 375-F and spray an 8x8-inch baking dish with nonstick cooking spray. Set aside.
  • Make the mashed potatoes according to the package directions but add 1 cup less liquid than what is called for.
  • Mix in the sour cream, cottage cheese, onion powder, garlic powder, chives and 2 tablespoons of butter until well combined.
  • Transfer the mixture to the prepared baking dish and dot the top with the remaining 1 tablespoon of butter.
  • Bake in a preheated 375°F oven for about 15-20 minutes. Then, switch the oven to the broiler setting and broil for 2-3 minutes to brown the top.
  • Serve hot, and enjoy the creamy, savory goodness of this comforting casserole.

Notes

Tried-And-True Tips:

  • Use full-fat sour cream and cottage cheese for the richest flavor
  • If you prefer a cheesier version, mix in 1 cup of shredded cheddar cheese before baking
  • Let the casserole sit for 5 minutes before serving to make it easier to cut and serve
  • For a crispy topping, sprinkle some breadcrumbs or crushed Ritz crackers mixed with melted butter over the casserole before baking

Nutrition

Serving: 0.5cupCalories: 195kcalCarbohydrates: 22gProtein: 6gFat: 10gSaturated Fat: 5gPolyunsaturated Fat: 0.4gMonounsaturated Fat: 2gTrans Fat: 0.2gCholesterol: 28mgSodium: 149mgPotassium: 334mgFiber: 2gSugar: 2gVitamin A: 338IUVitamin C: 21mgCalcium: 53mgIron: 0.4mg
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