Grandma's Mashed Potato Casserole

My grandma's signature mashed potato casserole. Super creamy mashed potatoes topped with melted cheese. Yum! If I had to pick one food to eat for the rest of my life, it would be this.

• Preparation Time: 35 mins
• Cooking Time: 55 mins
• Total Time: 1 hr 30 mins
• Calories: 310 Calories

Ingredients

• 1 tablespoon milk
• 1 (8 ounce) package cream cheese, softened
• ¼ cup margarine
• 1 (8 ounce) container sour cream
• 2 ½ teaspoons salt
• ¼ teaspoon ground black pepper
• 5 pounds potatoes, peeled and cut into chunks
• 1 tablespoon garlic powder, or more to taste
• ½ cup shredded Colby-Jack cheese, or more to taste

Recipe Instructions

Step 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. Drain.

Step 2

Return potatoes to the pot and mash until smooth. Add sour cream, cream cheese, margarine, and milk; beat until light and fluffy. Add in garlic powder, salt, and pepper. Transfer to a 9x13-inch casserole dish.

Step 3

Bake in the preheated oven until heated through, 30 to 40 minutes. Sprinkle Colby-Jack cheese over top and bake until cheese is melted, about 5 more minutes.