There’s nothing quite like the comforting warmth of a loaded mashed potato casserole, especially when you want to wow your family or guests with a hearty side dish. This recipe brings together creamy mashed potatoes, gooey cheese, crispy bacon, and fresh green onions into one irresistible casserole that’s perfect for any occasion.
Whether you’re serving it alongside your favorite roast or bringing a dish to a potluck, this loaded mashed potato casserole will quickly become a beloved classic in your recipe rotation. Let’s dive into how you can make this crowd-pleaser with ease and delicious results.
Why You'll Love This Recipe
- Rich and creamy texture with a crispy cheesy topping
- Easy to prepare with common ingredients
- Customizable with your favorite mix-ins like bacon and green onions
- Perfect for holidays, family dinners, or potlucks
- Comfort food that appeals to both kids and adults
Ingredients
Gather these simple ingredients to create your loaded mashed potato casserole that’s bursting with flavor and texture.
- 3 pounds russet potatoes, peeled and cubed
- 1/2 cup unsalted butter
- 1 cup whole milk, warmed
- 1 cup sour cream
- 2 cups shredded sharp cheddar cheese, divided
- 6 slices bacon, cooked crisp and crumbled
- 4 green onions, thinly sliced
- 1 teaspoon garlic powder
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 1/2 cup shredded mozzarella cheese (optional, for topping)
Recipe Details
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Total Time: 50 minutes
- Servings: 8
- Calories: Approximately 350 per serving
How to Make Loaded Mashed Potato Casserole
- Preheat your oven to 375°F (190°C) and grease a 9x13-inch baking dish lightly with butter or nonstick spray.
- Place the peeled and cubed potatoes into a large pot, cover with cold water, add a pinch of salt, and bring to a boil. Cook for 15-20 minutes until the potatoes are fork-tender.
- Drain the potatoes well and return them to the pot. Add the butter, warmed milk, sour cream, garlic powder, salt, and pepper. Mash until smooth and creamy.
- Stir in 1 1/2 cups of the shredded cheddar cheese, crumbled bacon, and sliced green onions, mixing until combined.
- Transfer the mashed potato mixture into the prepared baking dish, smoothing the top. Sprinkle the remaining 1/2 cup cheddar and the mozzarella cheese evenly over the top.
- Bake uncovered for 25-30 minutes, or until the casserole is heated through and the cheese topping is golden and bubbly.
- Remove from the oven and let it rest for 5 minutes before serving to allow the flavors to meld and the casserole to set slightly.
Tips for the Best Results
- Use russet potatoes for the fluffiest and creamiest mashed potatoes.
- Warm the milk before adding it to the potatoes to keep the mixture smooth and prevent lumps.
- Don’t overmix the potatoes to avoid gummy texture; mash just until smooth.
- For extra crispy bacon, bake it on a wire rack in the oven before chopping.
- Customize by adding chopped chives, jalapeños, or swapping cheddar for pepper jack for a twist.
Storage and Reheating
Store any leftover loaded mashed potato casserole in an airtight container in the refrigerator for up to 4 days. To freeze, place the casserole in a freezer-safe dish, cover tightly with foil or plastic wrap, and freeze for up to 3 months.
Reheat refrigerated leftovers in the oven at 350°F (175°C) for 20-25 minutes or until warmed through. For frozen casserole, thaw overnight in the fridge before reheating using the same oven method.
Frequently Asked Questions
Can I make this casserole ahead of time?
Yes! You can assemble the casserole a day in advance, cover it, and keep it in the refrigerator. When ready to bake, add a few extra minutes to the cooking time since it will be cold.
Can I substitute the bacon for a vegetarian option?
Absolutely. You can omit the bacon or replace it with sautéed mushrooms or crispy fried onions to keep a similar savory and crunchy element.
What type of cheese works best in this loaded mashed potato casserole?
Sharp cheddar is the classic choice for flavor and meltability, but you can mix in mozzarella or Monterey Jack for a creamier texture or even pepper jack for a bit of heat.
How do I get a crispy top on my casserole?
Using a combination of cheddar and mozzarella cheese on top helps create a golden, bubbly crust. Baking uncovered at 375°F allows the cheese to crisp up nicely without drying out the potatoes.