The Creamiest, Dreamiest Way to Serve Spuds
Let’s be honest—mashed potatoes are already pretty perfect. But turn them into a Mashed Potato Casserole, and you’re in a whole new league of comfort food. We’re talking buttery, fluffy mashed potatoes whipped into silky smoothness, layered with melty cheese, dotted with savory add-ins, and baked until golden and bubbly. It’s cozy, crowd-pleasing, and the ultimate way to level up your potato game. Trust me, this one disappears fast at the table.
Why You’ll Love Mashed Potato Casserole
This isn’t just another side dish—it’s a full-on flavor moment. Here’s why it’s a favorite:
Creamy and Comforting: Rich and velvety with every bite.
Perfect for Make-Ahead: Assemble ahead and bake when you’re ready.
Versatile: Dress it up with bacon, herbs, or even caramelized onions.
Feeds a Crowd: Ideal for holidays, potlucks, or big family dinners.
Kid-Approved: Simple, cheesy, and totally irresistible.
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Ingredients in Mashed Potato Casserole
Here’s what brings all the creamy, dreamy magic together:
Russet or Yukon Gold Potatoes
The fluffy foundation—perfect for smooth, buttery mash.
Butter
Adds richness and that classic mashed potato flavor.
Sour Cream
For a tangy twist and ultra-creamy texture.
Cream Cheese
Makes everything velvety and gives the casserole body.
Milk or Heavy Cream
Thins the potatoes just enough while keeping them luscious.
Shredded Cheese (Cheddar is classic!)
Melted into the mash and sprinkled on top for bubbly, golden goodness.
Garlic (optional)
Roasted or sautéed garlic adds an aromatic punch.
Salt & Pepper
Simple seasonings that make everything pop.
Optional Add-ins:
Chopped chives, crispy bacon, or even green onions for extra flair.
(Note: the full ingredients list, including measurements, is provided in the recipe card directly below.)
Instructions
Let’s build this creamy dream step-by-step:
Boil the Potatoes
Peel and chop your potatoes, then boil until fork-tender—about 15–20 minutes.
Mash and Mix
Drain well, then mash with butter, sour cream, cream cheese, milk, and seasonings until smooth and fluffy.
Add the Cheese
Stir in part of the shredded cheese and any optional mix-ins like chives or bacon.
Assemble in a Casserole Dish
Spread the mashed potato mixture into a greased baking dish and smooth the top.
Top and Bake
Sprinkle with more cheese and bake at 350°F (175°C) for 20–25 minutes, until golden and bubbly.
Let It Rest
Give it a few minutes to set before serving—it’ll hold its shape better.
Serve and Enjoy
Scoop it up and watch it disappear!
Nutrition Facts
Servings: 8
Calories per serving: [Calorie count per serving]
Preparation Time
Prep Time: 25 minutes
Cook Time: 25 minutes
Total Time: 50 minutes
How to Serve Mashed Potato Casserole
It’s the side dish that goes with just about everything:
With Roast Meats: Perfect alongside turkey, ham, or roast chicken.
With Gravy: Pour it on—these potatoes can take it.
Paired with Greens: Balance out the richness with a crisp salad or green beans.
As a Leftover Base: Top with shredded meat or veggies for a quick lunch.
Additional Tips
Use Warm Ingredients: Warm butter and milk mix more easily and help keep the mash fluffy.
Make It Ahead: Assemble and refrigerate up to 2 days in advance. Bake just before serving.
Add Texture: Top with breadcrumbs or crushed Ritz crackers for a crunchy topping.
Swap the Dairy: Use plain Greek yogurt instead of sour cream for a tangy, lighter option.
Double It: Feeding a crowd? This recipe scales up beautifully.
FAQ Section
Q1: Can I use instant mashed potatoes?
A1: You can, but fresh potatoes give the best flavor and texture.
Q2: How do I keep it from drying out?
A2: Don’t skimp on butter and cream, and cover with foil if baking longer.
Q3: Can I freeze this casserole?
A3: Yes—freeze before baking. Thaw overnight, then bake until heated through.
Q4: What’s the best cheese to use?
A4: Sharp cheddar is classic, but Gruyère, Monterey Jack, or a blend works great too.
Q5: Can I make it dairy-free?
A5: Yes! Use vegan butter, non-dairy milk, and plant-based cheese alternatives.
Q6: How long do leftovers last?
A6: 3–4 days in the fridge. Reheat in the oven or microwave.
Q7: Can I make it in a slow cooker?
A7: Absolutely. Keep it on “warm” to serve for parties or holidays.
Q8: Can I add eggs?
A8: Yes, one beaten egg can help bind if you want a firmer sliceable casserole.
Q9: Is it good without cheese?
A9: Totally! It’s still creamy and flavorful without cheese if you prefer.
Q10: What herbs go well with this?
A10: Chives, parsley, thyme, or rosemary all complement the richness beautifully.
Conclusion
Mashed Potato Casserole is comfort food at its finest—simple, indulgent, and utterly satisfying. Whether it’s front and center at a holiday feast or tucked beside your weeknight chicken dinner, this dish brings the cozy vibes every single time. Make it once, and it’s sure to earn a permanent spot in your go-to recipe lineup!
Print
Mashed Potato Casserole
- Total Time: 1 hour 5 minutes
- Yield: 8 servings 1x
- Diet: Vegetarian
Description
Creamy mashed potatoes baked with sour cream, cheese, and butter, then topped with more cheese and optional toppings like bacon and green onions for a rich and comforting casserole dish.
Ingredients
- 3 lbs russet potatoes, peeled and cubed
- 1/2 cup sour cream
- 1/2 cup milk (more as needed)
- 4 tbsp unsalted butter, melted
- 1 1/2 cups shredded cheddar cheese, divided
- 1 tsp garlic powder
- Salt and pepper to taste
- Optional: 1/2 cup cooked crumbled bacon
- Optional: 1/4 cup chopped green onions
Instructions
- Preheat oven to 375°F (190°C). Grease a 9×13-inch baking dish.
- Place peeled and cubed potatoes in a large pot, cover with water, and bring to a boil. Cook for 15–20 minutes or until fork-tender.
- Drain the potatoes and return them to the pot.
- Mash the potatoes with sour cream, milk, melted butter, garlic powder, salt, and pepper until smooth and creamy. Add more milk if needed for desired consistency.
- Stir in 1 cup of shredded cheddar cheese.
- Spoon the mashed potato mixture into the prepared baking dish and spread evenly.
- Sprinkle the remaining 1/2 cup of cheddar cheese on top. Add bacon and green onions if using.
- Bake uncovered for 20–25 minutes, or until the cheese is melted and the casserole is heated through.
- Let cool for a few minutes before serving.
Notes
- For extra richness, add cream cheese or an extra dollop of sour cream.
- This dish can be made ahead and refrigerated—just bake slightly longer when ready to serve.
- Use leftover mashed potatoes to save time.
- Try with other cheeses like Monterey Jack or Gruyère for variety.
- Prep Time: 20 minutes
- Cook Time: 45 minutes
- Category: Side Dish
- Method: Boiling and Baking
- Cuisine: American
Nutrition
- Serving Size: 1/8 of casserole
- Calories: 310
- Sugar: 2g
- Sodium: 290mg
- Fat: 18g
- Saturated Fat: 10g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 28g
- Fiber: 2g
- Protein: 8g
- Cholesterol: 45mg