Loaded mashed potato casserole combines all the best parts of a classic baked potato—think creamy potatoes, crispy bacon, melted cheese, and tangy sour cream—into one indulgent dish. It’s the perfect way to elevate traditional mashed potatoes, ideal for holidays like Thanksgiving and Christmas or any gathering that calls for a crowd-pleasing side.
Make-Ahead Mashed Potato Casserole
What makes this casserole special is its rich flavor and simplicity of preparation. You can assemble it beforehand, giving you more freedom to focus on other dishes during busy occasions. The cheese melts beautifully once baked to golden perfection, and the crispy bacon adds just the right texture.
Whether served alongside roasted meats or your favorite holiday spread, this casserole guarantees everyone at the table will return for seconds. It’s creamy, cheesy, and loaded with flavor—perfect for those who love the comfort of mashed potatoes but want to take them to the next level.
Ingredients
Mashed Potatoes
Sour Cream
Shredded Cheddar Cheese
Butter
Salt and Black Pepper
Bacon
Green Onions
How to Make Loaded Mashed Potato Casserole
Prepare the Mashed Potatoes
If using leftover mashed potatoes, ensure they are smooth and creamy. If making fresh, combine cooked, mashed potatoes with milk or cream, butter, salt, and pepper to taste. Fry the bacon and dice.
Combine Ingredients
Combine the prepared mashed potatoes, sour cream, 1 cup of shredded cheddar cheese, melted butter, salt, and pepper in a large bowl. Mix thoroughly until well combined.
Prepare the Baking Dish
Preheat the oven to 350°F (175°C). Grease a 9×13-inch baking dish with butter or cooking spray.
Assemble the Casserole
Pour the potato mixture into the prepared baking dish or cast iron pan. Top with the remaining 1 cup of shredded cheddar cheese and crumbled bacon.
Bake the Casserole
Place the casserole in the preheated oven and bake for 25-30 minutes, or until the cheese is melted, bubbly, and the casserole is heated through.
Serve
Remove the casserole from the oven and let it cool slightly before serving. Garnish with chopped green onions if desired. Serve hot alongside your favorite main dish.
Substitutions
Protein and Vegetable Additions: While bacon is a classic topping, it’s not the only option. You can omit the bacon or substitute it with another protein, like cubed ham or grilled chicken. Add vegetables like peas, corn, or broccoli to the mashed potato mixture to add a healthy boost.
Adjusting Serving Size: If you’re not feeding a large crowd, halve the recipe and bake it in an 8×8-inch casserole dish.
Dairy Substitutions: If you’re looking for a lighter option or have dietary restrictions, you can substitute the heavy cream with half-and-half. While this slightly reduces the richness, it will still deliver a creamy and flavorful dish.
Leftovers and Storage
Leftovers can be stored in an airtight container in the fridge for 3-4 days. For best results, reheat in the oven on low heat or microwave until warmed through. Freezing is not recommended, as dairy-rich dishes like this tend to lose their creamy texture and can separate when thawed.
Sides
These flavorful meatballs are a fantastic option to complement your creamy casserole—their smoky taste pairs beautifully with the richness of mashed potatoes.
Smoked Meatballs
This warm, gooey queso dip adds a cheesy touch to your meal. It’s excellent for dipping alongside or drizzling over your casserole.
Baked Queso Dip
A juicy grilled pork loin balances the smooth texture of mashed potatoes, making it ideal for a complete meal.
Grilled Pork Loin
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Loaded Mashed Potato Casserole
Ingredients
- 4 cups mashed potatoes
- 1 cup sour cream
- 2 cups shredded cheddar cheese – Divided half for mixing and half for topping
- 1/2 cup butter
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 6 slices bacon – Cooked and crumbled
- 1/4 cup chopped green onions – Optional for garnish
Instructions
- Preheat the Oven: Set your oven to 350°F (175°C).
- Mix the Ingredients: In a large bowl, combine the mashed potatoes, sour cream, 1 cup of cheddar cheese, butter, salt, and pepper. Stir until well mixed and creamy.
- Assemble the Casserole: Spread the mixture evenly into a greased 9×13-inch baking dish.
- Add the Toppings: Sprinkle the remaining cheese and crumbled bacon evenly over the top.
- Bake: Place the casserole in the oven and bake for 25-30 minutes, or until the cheese is melted and bubbly.
- Garnish and Serve: Remove from the oven and sprinkle with green onions before serving, if desired.
Smoke On!
Charlie
Author: Charlie Reeves
Hi, I’m Charlie, I have been meat-smoking and grilling for the past 15 years. I have an array of different smokers, thermometers, and have a love for finding the right wood and charcoal combo My favourite recipes are my EXTRA CRISPY smoked pork belly, juicy pulled pork, smoked brisket, duck poppers, and ANY SEAFOOD I grill).
I loves sharing his tips with beginners, helping them navigate the world of smoking. I find it’s not just about cooking; it’s a quest for that perfect smoky flavor.
You will usually find me playing with the kids, perfecting my brisket bark, or sipping beers with boys around the fire. Can’t wait to share all my delicious smoking and grilling recipes with you!
You can read more about me on our About Us page.
Hungry For More?
Smoke On!
Charlie
Author: Charlie Reeves
Hi, I’m Charlie, I have been meat-smoking and grilling for the past 15 years. I have an array of different smokers, thermometers, and have a love for finding the right wood and charcoal combo My favourite recipes are my EXTRA CRISPY smoked pork belly, juicy pulled pork, smoked brisket, duck poppers, and ANY SEAFOOD I grill).
I loves sharing his tips with beginners, helping them navigate the world of smoking. I find it’s not just about cooking; it’s a quest for that perfect smoky flavor.
You will usually find me playing with the kids, perfecting my brisket bark, or sipping beers with boys around the fire. Can’t wait to share all my delicious smoking and grilling recipes with you!
You can read more about me on our About Us page.
Hungry For More?