Name: Mashed Potato Casserole
Prep time: 20 min
Cook time: 25 min
Total time: 45 min
Cuisine: American
Ingredients: 3 pounds russet potatoes; 4 tablespoons butter; 4 ounces cream cheese; 1 cup sour cream; ½ cup milk; 1 teaspoon salt; ½ teaspoon black pepper; ½ teaspoon garlic powder; 1 ½ cups shredded cheddar cheese; 2 tablespoons chopped chives or parsley (optional); ½ cup cooked bacon crumbles (optional)

Creamy, dreamy, and comfort-laden, this Mashed Potato Casserole takes the classic side dish to the next level. Imagine your favorite buttery mashed potatoes whipped to perfection, layered in a casserole dish, topped with a golden cheesy crust, and kissed with just a hint of spice. It’s the kind of dish that warms you from the inside out and makes everyone at the table reach for seconds.

Perfect for family dinners, holiday gatherings, or just a cozy night in, this casserole is not only easy to make but also easy to prep ahead. Whether you’re serving a crowd or planning leftovers, it’s a hearty, satisfying recipe that complements any main course with ease.

Why You’ll Love This Mashed Potato Casserole

This dish takes everything you adore about mashed potatoes and makes them even better. With a creamy texture, a cheesy baked top, and optional additions like crispy bacon or chives, it’s customizable to your taste and occasion. Plus, it’s make-ahead friendly and reheats beautifully, making it ideal for busy hosts or weeknight planners.

Whether you’re pairing it with roast beef, turkey, or grilled veggies, this casserole adds rich flavor and texture without much effort. It’s comfort food made easier, and definitely made better.

Preparation Phase & Tools to Use

Before diving into the ingredients, get your kitchen tools ready to make the process smoother and more enjoyable.

Essential Tools and Equipment:

Large Pot: For boiling the potatoes until fork-tender. A wide, heavy-bottom pot ensures even cooking.
Potato Masher or Ricer: For that perfectly smooth or slightly rustic mash texture, depending on your preference.
Hand Mixer (optional): If you want ultra-creamy mashed potatoes, a hand mixer will whip them to a light, airy consistency.
Casserole Dish: Choose a 9×13-inch baking dish or similar for even baking and serving.
Spatula or Wooden Spoon: To fold in ingredients like cheese, butter, and sour cream.
Oven: For baking the assembled casserole until golden and slightly crisp on top.

Ingredients for the Mashed Potato Casserole

Russet Potatoes: The starchy base for fluffy mashed potatoes.
Butter: Adds richness and that melt-in-your-mouth quality.
Cream Cheese: Gives a tangy depth and ultra-creamy texture.
Sour Cream: Balances the flavors and enhances creaminess.
Milk: Helps achieve the perfect consistency without thinning it too much.
Salt and Pepper: Basic seasoning to enhance all the flavors.
Garlic Powder: Adds savory warmth without overpowering.
Shredded Cheddar Cheese: Melts beautifully on top, adding a golden, bubbly finish.
Chives or Parsley (optional): For a fresh pop of color and mild oniony bite.
Cooked Bacon Crumbles (optional): A crispy, savory bonus if you’re feeling indulgent.

How To Make the Mashed Potato Casserole

Step 1: Boil the Potatoes

Peel and cut the potatoes into chunks. Boil them in salted water until they are fork-tender, about 15–20 minutes. Drain thoroughly.

Step 2: Mash and Mix

Return the potatoes to the pot or a large mixing bowl. Add butter, cream cheese, sour cream, milk, garlic powder, salt, and pepper. Mash or beat until smooth and creamy.

Step 3: Assemble the Casserole

Preheat your oven to 375°F (190°C). Spread the mashed potatoes evenly in a greased casserole dish. Top with shredded cheddar cheese and any optional toppings like bacon or herbs.

Step 4: Bake to Perfection

Bake uncovered for 20–25 minutes, or until the cheese is melted and bubbly with a light golden crust.

Step 5: Serve and Savor

Sprinkle with chopped parsley or chives before serving for that finishing touch.

Serving and Storing Mashed Potato Casserole

This casserole is best served hot, straight from the oven. It pairs wonderfully with roasted meats, holiday mains, or as part of a cozy winter spread.

To Store: Cool leftovers completely before transferring to an airtight container. Store in the fridge for up to 4 days.

To Reheat: Warm in the oven at 350°F (175°C) until heated through, or microwave individual portions.

To Make Ahead: Prepare and assemble the casserole the day before, cover, and refrigerate. Add a few extra minutes to the baking time when cooking from cold.

Frequently Asked Questions

Can I use Yukon Gold potatoes instead of Russet?

Yes! Yukon Golds will give a creamier, buttery mash, while Russets are fluffier. Both work well here.

Can I freeze mashed potato casserole?

You can freeze it, though the texture may slightly change. Freeze after assembling (but before baking) for best results.

How do I make this casserole even more decadent?

Add caramelized onions, extra cheese layers, or a breadcrumb topping for bonus flavor and crunch.

Is this recipe gluten-free?

Yes, as long as your ingredients (like sour cream and cheese) are certified gluten-free.

What kind of cheese works best on top?

Cheddar is classic, but gouda, mozzarella, or even a spicy pepper jack can add great flavor.

Can I make this in a slow cooker?

You can prepare the mashed potatoes and keep them warm in a slow cooker, but for that golden cheesy top, oven baking is recommended.

Want More Potato Side Dish Ideas?

If you love this mashed potato casserole, you’ll probably enjoy these other cozy side dish winners:

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📌 Save this recipe to your Pinterest comfort food board so you can come back to it any time: Kitchen by Kate on Pinterest

And let me know in the comments how yours turned out. Did you add bacon or stick with the classic version? Did you go creamy or chunky?

I love hearing how others make these recipes their own. Questions are welcome too—let’s help each other bake smarter.