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Mashed Potato Casserole Recipe

Lil' Luna
Creamy cheesy mashed potato casserole is like no other. This AMAZING side dish takes mashed potatoes to a whole new level!
5 from 68 votes
Prep Time 35 minutes
Cook Time 20 minutes
Total Time 55 minutes
Course Side Dish
Cuisine American
Servings 12
Calories 469 kcal


  • 5 lb potatoes peeled and cubed
  • 1 cup sour cream
  • 1/2 cup butter
  • 8 oz cream cheese cubed
  • 1/2 cup milk
  • 2 teaspoons garlic salt (with parsley flakes)
  • pepper to taste
  • 12 slices bacon cooked, chopped, and divided
  • 2 cup cheddar cheese divided
  • 1/2 cup parmesan cheese
  • green onions for garnish


  • Peel and cube potatoes.
  • Place in pot and add water until just covering potatoes. Bring to boil. Once boiling, reduce to a simmer and cook for 18-20 minutes.
  • Drain water and mash potatoes using a masher or spoon. Add sour cream, butter, cream cheese, and milk until well combined. Add salt and pepper. Fold in ½ the bacon, 1 cup cheddar cheese, and parmesan cheese. Stir well.
  • Spoon into a lightly greased 9x13 pan. Top with remaining cheddar cheese and the rest of the bacon.
  • Bake at 350°F for 20-25 minutes. Garnish with green onions and ENJOY!



If making ahead refrigerate until ready to bake, and bake for 30-35 minutes.


Calories: 469kcalCarbohydrates: 25gProtein: 15gFat: 34gSaturated Fat: 18gCholesterol: 89mgSodium: 883mgPotassium: 912mgFiber: 4gSugar: 1gVitamin A: 855IUVitamin C: 21.7mgCalcium: 296mgIron: 6.5mg
Keyword cheesy mashed potatoes, loaded mashed potato casserole, Mashed Potato Casserole, mashed potato casserole recipe
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