Mama's Famous Cheesy Mashed Potato Casserole

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This is a favorite mashed potato casserole recipe handed down through the family. These cheesy mashed potatoes are the best you'll ever taste! Everyone is sure to love it. Mama usually just throws together whatever amounts she thinks taste good. But I did get her to give me a recipe with measurements.

Submitted by Amy Eckel
Updated on February 9, 2022
5
5
Prep Time:
25 mins
Cook Time:
1 hr 5 mins
Total Time:
1 hr 30 mins
Servings:
10
Yield:
10 servings
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Ingredients

Original recipe (1X) yields 10 servings

  • 5 pounds potatoes, peeled and cubed

  • 1 cup sour cream

  • ½ cup butter

  • ½ cup grated Parmesan cheese

  • 6 ounces cream cheese, softened

  • 4 ounces extra-sharp Cheddar cheese, shredded

  • 4 stalks green onions, chopped

  • 1 teaspoon salt

  • 1 teaspoon ground black pepper

Directions

  1. Place potatoes into a large pot and cover with salted water; bring to a boil. Reduce heat to medium-low and simmer until tender, 15 to 20 minutes.

  2. While the potatoes are cooking, preheat the oven to 350 degrees F (175 degrees C).

  3. Drain potatoes and return to the pot. Mash while hot. Add sour cream, butter, Parmesan cheese, cream cheese, Cheddar cheese, green onions, salt, and pepper; beat until well blended. Transfer to a 3-quart casserole.

  4. Bake in the preheated oven for 45 minutes. Serve piping hot.

Cook's Notes:

You make this casserole in advance, cover, and put in the fridge for up to 3 days. Take out 1 hour before baking.

You can either bake it in the oven or stick it in a slow cooker on Low for 5 to 8 hours or on High for 3 to 5 hours. This recipe is best served piping hot!

Nutrition Facts (per serving)

430 Calories
25g Fat
42g Carbs
11g Protein
Nutrition Facts
Servings Per Recipe 10
Calories 430
% Daily Value *
Total Fat 25g 32%
Saturated Fat 16g 79%
Cholesterol 69mg 23%
Sodium 507mg 22%
Total Carbohydrate 42g 15%
Dietary Fiber 5g 19%
Total Sugars 2g
Protein 11g 22%
Vitamin C 46mg 51%
Calcium 202mg 16%
Iron 2mg 13%
Potassium 1047mg 22%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.

(-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.