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Deliciously cheesy mashed potato casserole is a comforting twist that takes a classic side dish to a whole new level!
WE LOOOVE THEM!
We love Mashed Potatoes (in fact, we are strong believers they are the real star of Thanksgiving), but put them in casserole form and add even more cheese and goodness, and we promise you’ll be obsessed with today’s Mashed Potato Casserole.
This potato side dish is a casserole version of Mashed Potatoes and Twice Baked Potatoes combined and is the perfection addition to your holiday meal. Plus, it’s simple and can be made ahead of time making it holiday perfection.
WHY WE LOVE IT:
- DELICIOUS!! With butter, potatoes, bacon, cheese, cream cheese, sour cream, and more – what’s not to love? The flavor is incredible!
- Make ahead of time. We love this for holidays and love that it can be made in advance, which is great for busy weeks and get-togethers.
- Feeds a crowd. It’s great for company since it feeds a lot, making is perfect for holidays like Thanksgiving and Christmas.
Ingredients
PREP TIME: 35 minutes
BAKE TIME: 20 minutes
- 5 pounds potatoes – Russet potatoes and Yukon Gold potatoes are preferred – they have a perfect amount of starch which helps create creamy, flavorful potatoes.
- 1 cup sour cream – use full-fat sour cream.
- ½ cup butter – salted or unsalted work great, but you may need more salt if you’re using unsalted butter.
- 8 ounces cream cheese
- ½ cup milk – use 2% or higher for this recipe.
- 2 teaspoons garlic salt (with parsley flakes)
- black pepper – to taste
- 12 slices cooked bacon – We prefer to make Bacon in the Oven but you can also use a microwave bacon if you’re in a rush.
- 2 cups cheddar cheese – use other cheeses or a blend of your favorites including Mozzarella and Italian blend.
- ½ cup parmesan cheese
- garnish – green onion, chives, or other fresh herbs work great.
How to Make Mashed Potato Casserole
- POTATOES. Peel and cube 5 pounds potatoes. Place in a large pot and add water until just covering potatoes. Bring to boil. Once boiling, reduce to a simmer and cook for 18-20 minutes.
- MASH. Drain water and mash potatoes using a potato masher or spoon (do not over-mix or potatoes will become gummy). Add 1 cup sour cream, ½ cup butter, 8 ounces cream cheese, and ½ cup milk until well combined.
- SEASON. Add 1 teaspoon garlic salt, and black pepper to taste. Fold in ½ of the cooked bacon, 1 cup cheddar cheese, and ½ cup parmesan cheese. Stir well.
- BAKE. Spoon into a lightly greased 9×13 pan. Top with remaining shredded cheddar cheese and the rest of the bacon. Bake at 350°F for 20-25 minutes.
- TOPPINGS. Garnish with green onions or chives.
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Mashed Potato Casserole
Deliciously cheesy mashed potato casserole is a comforting twist that takes a classic side dish to a whole new level!
Equipment
Ingredients
- 5 pounds potatoes, peeled and cubed
- 1 cup sour cream
- ½ cup butter
- 8 ounces cream cheese, cubed
- ½ cup milk
- 2 teaspoons garlic salt (with parsley flakes)
- pepper to taste
- 12 slices bacon, cooked, chopped, and divided
- 2 cups cheddar cheese, divided
- ½ cup parmesan cheese
- green onions, for garnish
Instructions
- Peel and cube potatoes.
- Place in pot and add water until just covering potatoes. Bring to boil. Once boiling, reduce to a simmer and cook for 18-20 minutes.
- Drain water and mash potatoes using a masher or spoon. Add sour cream, butter, cream cheese, and milk until well combined. Add salt and pepper. Fold in ½ the bacon, 1 cup cheddar cheese, and parmesan cheese. Stir well.
- Spoon into a lightly greased 9×13 pan. Top with remaining cheddar cheese and the rest of the bacon.
- Bake at 350°F for 20-25 minutes. Garnish with green onions and ENJOY!
Video
Notes
Nutrition
Calories: 469kcal, Carbohydrates: 25g, Protein: 15g, Fat: 34g, Saturated Fat: 18g, Cholesterol: 89mg, Sodium: 883mg, Potassium: 912mg, Fiber: 4g, Sugar: 1g, Vitamin A: 855IU, Vitamin C: 21.7mg, Calcium: 296mg, Iron: 6.5mg
Nutrition information is automatically calculated, so should only be used as an approximation.
Recipe FAQ
How Much Should I Make?
- It may depend on how much your family loves mashed potatoes. Here is a quick guide to help:
- 10 people – 1 dish
- 20-25 people – double recipe
- 35-40 people – triple recipe
Making ahead of time:
- We recommend making this no more than 48 hours in advance, cover and refrigerate. Cook until warmed throughout.
How to Store Leftover Mashed Potato Casserole?
- Store leftovers in an airtight container in the fridge for 3-5 days.
- To freeze, simply spread them into a freezer Ziploc bag and squeeze out as much air as possible. They’re best when used within 6-8 weeks, but can last for up to 4 months.
- To reheat. Let potatoes thaw in the fridge overnight. Place potatoes in a casserole dish and bake at 350°F for about 25 minutes. Add additional cheese and top and bake for an additional 5 minutes.
Recipe adapted from McCormick.
This is so good! It is a great, quicker option to twice-baked potatoes!
love mashed potatoe , No Gravy needed here , great bunches flavors. dats what its all about flavor
Thanks for sharing this excellent alternative way to make/serve twice baked potatoes. I love the casserole twist – so much easier to make (especially if you are prone to ripping potato skins) and so much easier to share too – a perfect potluck side that will never have leftovers!
I love this casserole! The mashed potatoes make it different.
I make Lil’ Luna recipes all the time!
Just the best!
Love this recipe! I used plain Greek yogurt, instead of sour cream/cream cheese, since I had it on hand and added some roasted Hatch green chile into the mix. Great side dish for ribs!
This was a great recipe but I found it a bit too runny and salty. Better as leftovers for the texture but next time I will cut back on the parmesan cheese and even the bacon. I didn’t even use garlic salt, just garlic powder and only added bacon to the top, not mixed in with the potatoes. Lesson learned I guess. Still overall was decent the next day. I’ll try again soon.
This was a huge hit at our Easter dinner with family. Even my 8 month old grandson loved it! I did cut about half of the garlic salt because most of my family isn’t a fan of too much garlic. We will definitely make this recipe again!! Thank you so much!
Uou’re welcome! I’m so glad the recipe was a hit with your family!
It was delicious!!!! Made it for Christmas Eve and everyone loved it!!!!!
Hi I plan to make this for Xmas..i do not plan on using bacon but was wondering if sauteed yellow onions can be added as well??
I haven’t tried it with the sautéed onions, but I bet it would be a delicious swap for the bacon. You’ll have to let us know how the casserole turned out! 🙂
Great for Christmas morning. Whole family will love them . Easy and yummy