A scoop of baked mashed potatoes garnish with cheese, bacon pieces and chives.

The Best Loaded Mashed Potato Casserole

The Best Loaded Mashed Potato Casserolecheesy mashed potato loaded with lots of cheese and bacon pieces, a must have holiday side dish.

A wooden spoon pulling up a scoop of cheesy mashed potato.

Fluffiest, creamiest & one of the best loaded mashed potatoes you will ever try.

This ultimate mashed potato casserole recipe includes step by step picture instructions so you can follow and make insanely delicious & fail-proof mashed potatoes.

I am planning to make this loaded mashed potato casserole for Thanksgiving side dish this year.

In my family, it is a holiday tradition to have the best mashed potatoes as one of the holiday side dishes.

What to Make with leftover Mashed Potatoes?

If you have leftover mashed potatoes you must try these mouthwatering easy recipes using leftover mashed potatoes:

Flat lay of the ingredients for mashed potatoes, on the table laying potatoes, milk, chives, sour cream, butter, cheese and bacon.

Quick Tip: Before cooking any recipe, I always recommend to prepare all ingredients first. It makes cooking so much enjoyable.

8 Slices of bacon on a baking sheet lied with foil paper, ready for baking.

How to Bake Bacon in the Oven?

First, place bacon on a baking sheet lined with foil paper and bake at 400F for 10 min or until crispy texture.
After bacon bakes let it cool down then finely chop bacon into tiny pieces for garnish & set aside.

Sliced potato inside the pot filled with water.

How to Make Loaded Mashed Potatoes Casserole:

While bacon is baking, peel and slice 5 lb potatoes and place them into a big pot. Cover potatoes with water and bring it to a boil.
After potatoes start boiling reduce the heat to medium/high and cook for about 10-15 minutes or until potatoes turn soft when inserted with a knife.

Cooked potato inside the mixing bowl with sour cream, milk and butter.

Drain water and place potato in a big mixing bowl.
Preheat the oven to 350F.

In a mixing bowl mashed potatoes mixing with cheese.

Now add 3/4 cup sour cream, 1 cup milk, 5 tablespoons of butter, salt and pepper to taste. Blend with a blender until fluffy texture.
Using a spatula fold in 2 cups of cheese, then trasfer potatoes to a casserole dish. A casserole with mashed potatoes and cheese on top.
Finally, top mashed potatoes with 1 cup of shredded cheese and bake uncovered at 350F for 30 minutes or until heated thru.

A scoop of baked mashed potato casserole garnish with cheese, bacon pieces and chives.

Garnish mashed potato casserole with crumbled bacon pieces and finely chopped fresh chives. Enjoy!

How to Make Loaded Mashed Potatoes Ahead?

When cooking for the event like Thanksgiving, make this potato casserole ahead by following step 1-3, then cover the casserole and place it in the fridge until you are ready to bake it.  About 30 minutes before serving follow step 4-5.

How to store leftover mashed potatoes?

Store leftover mashed potatoes in a airtight container inside the fridge for up to 3 days.

A scoop of baked mashed potatoes garnish with cheese, bacon pieces and chives.
Print Recipe
5 from 5 votes

The Best Loaded Mashed Potato Casserole

Loaded Mashed Potato Casserole with bacon and lots of cheese. It is a must Thanksiging sidedish.
Prep Time10 mins
Cook Time45 mins
Total Time55 mins
Course: Side Dish
Cuisine: American
Keyword: mashed potato
Servings: 12

Ingredients

  • 5 lb organic potatoes peeled and sliced
  • 3/4 cup sour cream
  • 1 cup milk
  • 5 tablespoons butter
  • salt & pepper to taste
  • 3 cups medium Chadder cheese shredded
  • 8 slices bacon baked in the oven 400F for 10 min,
  • chives chopped for garnish

Instructions

  • First, place bacon on a baking sheet lined with foil paper and bake at 400F for 10 min or until crispy texture, after finely chop bacon into tiny pieces for garnish & set aside.
  • While bacon is baking, peel and slice 5 lb potatoes and place them into a big pot. Cover potatoes with water and bring it to a boil. After potatoes start boiling reduce the heat to medium/high and cook for about 10-15 minutes or until potatoes turn soft when inserted with a knife.
  • Preheat the oven to 350F.
    Drain water and place potato in a big mixing bowl. Now add 3/4 cup sour cream, 1 cup milk, 5 tablespoons of butter, salt and pepper to taste. Blend with a blender until fluffy texture.
  • Using a spatula fold in 2 cups of cheese, then trasfer potatoes to a casserole dish, top with 1 cup of shredded cheese and bake uncovered at 350F for 30 minutes or until heated thru.
  • Garnish potato casserole with crumbled bacon pieces and finely chopped fresh chives. Enjoy!

Notes

  • How to Make Loaded Mashed Potatoes Ahead: When cooking for the event like Thanksgiving, make this potato casserole ahead by following step 1-3, then cover the casserole and place it in the fridge until you are ready to bake it.  About 30 minutes before serving follow step 4-5. 
  • What to Make with Mashed Potatoes? If you have leftover mashed potatoes you must try these 3 mouthwatering easy recipes using mashed potatoes:
Cheese Stuffed Potato Balls
Potato Pierogi
Mashed Potatoes with Russet Potatoes & Macaroni
  • How to store leftover mashed potatoes? Store leftover mashed potatoes in a airtight container inside the fridge for up to 3 days.
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A scoop of loaded mashed potato casserole on a wooden spoon.

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Love Keil is passionate about cooking delicious homemade food for her family. She is eager to turn her 2 picky eaters to happy eaters, by inviting them to cook with her. Here you will find delicious recipes sometimes cooked by 3 & 7 year old girls, as well as cute crafts for kids and some awesome DIYs. If you are inspired by Munchkin Time sign up for email updates, to get fresh recipes emailed to you! Thank you for stopping by!

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10 thoughts on “The Best Loaded Mashed Potato Casserole

  1. 5 stars
    Oh, my gosh, my family inhaled this!! It’s definitely going to become a regular side dish. The perfect combo of cheese, potatoes an bacon!!

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