Mississippi Mud Mashed Potato Casserole

This Mississippi Mud Mashed Potato Casserole is the ultimate comfort food side dish, loaded with creamy, buttery mashed potatoes and topped with crispy bacon and melty cheddar cheese. Every bite is rich, savory, and packed with bold, satisfying flavor that makes it perfect for holidays, potlucks, or family dinners.

With a smooth, fluffy potato base and indulgent mix-ins like sour cream and mayonnaise, this casserole bakes into a golden, cheesy masterpiece. It’s hearty enough to stand out on any table and simple enough to become a go-to favorite whenever you need a crowd-pleasing dish.

Prep Time: 10 minutes
Cook Time: 50 minutes
Total Time: 1 hour
Servings: 12

Ingredients

  • 1 pound sliced bacon
  • 2 1/2 pounds russet potatoes, peeled and quartered
  • 3 cloves garlic, peeled
  • 1 cup milk
  • 3 tablespoons butter
  • 1/2 cup mayonnaise
  • 1/4 cup sour cream
  • 1/2 teaspoon freshly ground black pepper
  • 1/4 teaspoon paprika
  • 1 1/2 cups shredded Cheddar cheese, divided
  • Chopped green onions, for garnish

Directions

  1. Preheat the oven to 350°F (175°C) and grease a 9×13-inch baking dish.
  2. Cook the bacon in a large skillet over medium-high heat until crispy, about 10 minutes. Turn occasionally to ensure even cooking. Transfer to paper towels to drain, then crumble once cooled.
  3. Bring a large pot of salted water to a boil. Add the potatoes and garlic, reduce heat to medium, and simmer until fork-tender, about 15 to 20 minutes.
  4. While the potatoes cook, heat the milk and butter together in a small saucepan over low heat until the butter is fully melted.
  5. Drain the potatoes and return them to the pot. Gradually add the warm milk mixture, mashing until smooth and creamy. Stir in mayonnaise, sour cream, black pepper, and paprika.
  6. Fold in 1 cup of the shredded Cheddar cheese and half of the crumbled bacon.
  7. Spread the mashed potato mixture evenly into the prepared baking dish. Top with the remaining cheese and bacon.
  8. Bake for about 20 minutes, or until the cheese is melted and bubbly.
  9. Garnish with chopped green onions and serve warm.
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