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This Loaded Mashed Potato Casserole has everything I love about a loaded baked potato, all tucked into creamy mashed potatoes with plenty of cheese and bacon. It’s such an easy, cozy side dish for a holiday meal, family dinner, or whenever you want to make mashed potatoes a little more fun!

Loaded Mashed Potato Casserole in a baking dish.

A Cozy Make-Ahead Side Dish

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On a busy day, there’s nothing better than knowing dinner is already waiting for you in the refrigerator! I love making this loaded mashed potato casserole ahead of time when I know I have a crazy-busy day coming up.

Then when dinner rolls around, I can just pull it out and warm it up. One less thing to worry about!

And guess what?! You can make this up to 2 days ahead. I LOVE that! Having dinner already prepped makes those extra-busy days so much easier.

But here’s the thing! If you make this recipe ahead of time, the baking directions will be a little different since your Loaded Mashed Potato Casserole will be cold from the refrigerator. Prepare the casserole up to 2 days ahead, cover, and refrigerate. When you’re ready to serve, bake it covered at 350°F for 30–40 minutes, or until heated through. Uncover for the last 10–15 minutes until the cheese is melted and bubbly. So easy!

These mashed potatoes are SO creamy and rich, with all the cozy flavors you want in a loaded baked potato. They’re warm, cheesy, and comforting, with crispy bits throughout and plenty piled on top. And that little pop of green onion at the end is just perfect.

Basically, it’s everything you love about a loaded baked potato, but in creamy mashed potato form. So good!

This is definitely one I’d make ahead when I know I have a busy day coming up. And if you’re looking for another cozy casserole dinner to have on hand, my Chicken Broccoli Casserole is another one to try!

Close up look of Loaded Mashed Potato Casserole.
5 from 1 vote

Loaded Mashed Potato Casserole

By Melissa Johnson
Prep: 1 hour 5 minutes
Cook: 15 minutes
Total: 1 hour 20 minutes
Servings: 8
This Loaded Mashed Potato Casserole is creamy, cheesy, loaded with bacon, and so easy to make ahead. It’s the perfect cozy side dish for holiday dinners, family meals, and gatherings.

Equipment

  • 1 Hand Mixer
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Ingredients 

  • 7 pounds russet potatoes, peeled and halved
  • 1 cup cooked bacon bits
  • 1½ cups sour cream
  • â…“ cup salted butter
  • ¼ cup heavy cream
  • 2 garlic cloves, minced
  • 1½ cups shredded cheese
  • 1 teaspoon salt
  • ½ cup cooked bacon bits, for topping
  • â…“ cup chopped green onions, for topping
  • 1½ cups shredded cheese, for topping

Instructions 

  • Add the peeled and halved potatoes to a large pot and cover with water. Salt the water as desired. Boil for about 30 minutes, or until tender, then drain.
  • With a hand mixer, mix in the heavy cream, butter, and 1 teaspoon salt.
  • Fold in the sour cream, cheese, bacon bits, and garlic.
  • Once your mashed potatoes are ready, spread them into a baking dish and top with additional cheese and bacon.
  • Bake the casserole at 350°F for 15 minutes, or until the cheese is melted.
  • Finish off the casserole with chopped green onions before serving. It’s that easy!
    green onions

Notes

1. Make ahead: Prepare the casserole up to 2 days ahead, cover, and refrigerate. When ready to serve, bake covered at 350°F for about 30–40 minutes, or until heated through. Uncover for the last 10–15 minutes, or until the cheese is melted and bubbly.
2. Bacon: I use cooked bacon bits to keep this recipe quick and easy, but freshly cooked crispy bacon is always delicious if you have the extra time too!
3. Cheese: I love using freshly grated cheese because it melts beautifully and gives the casserole an extra creamy texture. Pepper Jack, smoked cheddar, extra-sharp cheddar, or Monterey Jack would all be delicious.

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About Melissa Johnson

My bakery experience taught me the secrets to simple baking. Now, I share easy-to-follow recipes and party ideas through Best Friends For Frosting® and my cookbook, Celebrating Everyday, simplifying everyday cooking and holiday celebrations.

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Recipe Rating




1 Comment

  1. Chef Ryan says:

    5 stars
    Great dish and taste. Fresh outlook on classic mashed potatoes.