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Mashed Potato Casserole Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4 from 76 reviews
  • Author: Elizabeth
  • Prep Time: 20 minutes
  • Cook Time: 25 minutes
  • Total Time: 45 minutes
  • Yield: 8 servings
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American
  • Diet: Gluten Free

Description

This creamy and cheesy Mashed Potato Casserole combines smooth mashed potatoes with sharp cheddar, crispy bacon, and fresh green onions for a comforting and flavorful side dish perfect for family dinners or holiday gatherings.


Ingredients

Scale

Potatoes & Dairy

  • 4 pounds russet potatoes, peeled and cut into chunks
  • 1 cup sour cream
  • 4 ounces cream cheese, softened
  • 1/2 cup unsalted butter, melted
  • 1/2 cup whole milk

Seasonings & Toppings

  • 1 1/2 teaspoons salt
  • 1/2 teaspoon black pepper
  • 1 teaspoon garlic powder
  • 1 cup shredded cheddar cheese, divided
  • 6 slices bacon, cooked and crumbled, divided
  • 1/4 cup chopped green onions, divided


Instructions

  1. Boil Potatoes: Boil the peeled and chunked russet potatoes in a large pot of salted water until fork-tender, about 15 to 20 minutes.
  2. Mash Potatoes: Drain the cooked potatoes thoroughly and return them to the pot. Mash the potatoes until smooth and creamy.
  3. Add Dairy and Seasonings: Stir in sour cream, softened cream cheese, melted butter, whole milk, salt, black pepper, and garlic powder until the mixture is creamy and well combined.
  4. Mix in Half Toppings: Fold in half of the shredded cheddar cheese, half of the crumbled bacon, and half of the chopped green onions evenly into the mashed potato mixture.
  5. Prepare for Baking: Transfer the mashed potatoes into a greased 9×13-inch baking dish and spread evenly.
  6. Add Remaining Toppings: Sprinkle the remaining cheddar cheese and crumbled bacon evenly over the top of the mashed potatoes.
  7. Bake: Place the casserole in a preheated oven at 350°F (175°C) and bake for 20 to 25 minutes, or until the cheese is melted and the casserole is heated through.
  8. Garnish and Serve: Remove from oven and garnish with the remaining chopped green onions before serving warm.

Notes

  • This casserole can be made ahead of time and refrigerated for up to 2 days before baking. Allow it to sit at room temperature for 30 minutes prior to reheating.
  • For a vegetarian version, omit the bacon or substitute with plant-based bacon alternatives.