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Cheesy Mashed Potato Casserole

This cheesy mashed potato casserole is creamy, rich, and baked until perfectly golden with a crispy panko topping. Loaded with cheddar cheese, butter, and sour cream, then finished with bacon and chives, it’s an irresistible comfort food side dish that’s perfect for holidays, gatherings, or cozy family dinners.
Prep Time30 minutes
Cook Time20 minutes
Total Time50 minutes
Servings: 8

Ingredients

Mashed Potato Base

  • 3 pounds russet potatoes
  • Water for boiling
  • 7 tablespoons butter
  • 3/4 cup sour cream
  • 1/4 cup milk
  • 1/2 teaspoon garlic powder
  • 3/4 teaspoon salt
  • 1 cup shredded cheddar cheese

Topping

  • 1/4 cup panko breadcrumbs
  • 1 tablespoon butter
  • 2 tablespoons chopped chives
  • 5 strips bacon cooked
  • 1/2 cup shredded cheddar cheese

Instructions

  • Peel and chop the potatoes, then place them in a large pot. Cover with water and bring to a boil. Cook for about 20 minutes, or until fork-tender.
  • Preheat the oven to 350°F (175°C).
  • Drain the potatoes and transfer them to a large mixing bowl. Add butter, sour cream, milk, garlic powder, and salt. Mash until smooth, or use a hand or stand mixer for extra creaminess.
  • Stir in the shredded cheddar cheese until fully combined.
  • Spray a 2-quart baking dish with cooking spray. Spoon the potato mixture into the dish and smooth the top.
  • In a small saucepan, melt 1 tablespoon butter and add the panko breadcrumbs. Cook over medium heat until lightly toasted.
  • Sprinkle the toasted panko over the potatoes, then top with additional shredded cheddar cheese.
  • Bake uncovered for about 15 minutes, or until the cheese is melted and bubbly.
  • Remove from the oven and top with cooked bacon and chopped chives. Serve warm.

Notes

  • Use Russet Potatoes: They mash smoothly and create a fluffy texture.
  • Make It Ahead: Assemble the casserole and refrigerate, then bake before serving.
  • Extra Creamy: Use a mixer instead of a masher for ultra-smooth potatoes.
  • Storage: Store leftovers covered in the refrigerator for up to 3 days.
  • Variations: Add roasted garlic or substitute bacon with turkey bacon if desired.