Mashed Potato Casserole

Mashed Potato Casserole is the mashed potato dream from my childhood. My mom often made this “better-than-plain mashed potatoes” version to serve with a Sunday roast or her best chicken dinners. It’s comfort food perfection any time of year—but swapping it in for regular mashed potatoes at Thanksgiving or Christmas will instantly elevate your holiday table.

Why You’ll Love This Mashed Potato Casserole

• Creamy and comforting: This Mashed Potato Casserole is rich, buttery, and perfectly smooth—thanks to sour cream and cream cheese that create the ultimate fluffy texture.

• No egg needed: Unlike other mashed potato casserole recipes, this one skips the egg for true mashed-potato fluffiness. You’ll get soft, cloud-light potatoes every time—never dense or rubbery.

• Perfect make-ahead side dish: You can assemble this Mashed Potato Casserole a day ahead, making it an effortless choice for Thanksgiving, Christmas, or any gathering.

• Crispy, golden topping: A generous sprinkle of paprika and dots of butter bake into a gorgeous golden crust that adds just the right touch of flavor and texture.

• Crowd-pleasing favorite: This dish serves a big family or holiday crowd and pairs beautifully with turkey, ham, roast beef, or any main entrée.

• Simple ingredients, big flavor: Made with pantry staples and fresh chives, this Mashed Potato Casserole delivers comforting, homemade flavor without extra fuss.

Ingredients in Mashed Potato Casserole

Russet potatoes: The classic choice for light and fluffy mashed potatoes. Their starchy texture helps the casserole stay creamy without being heavy. Peel and cube them evenly so they cook at the same rate.

Sour cream: Adds a tangy flavor and creamy texture that balances the richness of the cheese and butter. It’s one of the secrets to that irresistible smoothness.

Cream cheese: Softened cream cheese melts right into the warm potatoes, creating a luxuriously velvety consistency. It also helps the casserole hold its shape without drying out.

Garlic salt, salt, and black pepper: Simple seasonings that add depth and bring out the natural potato flavor. The garlic salt provides a subtle savory note that complements the creamy base.

Chives: Freshly chopped chives add a mild onion flavor and a pop of green color. You can substitute green onions if that’s what you have on hand.

Cheddar cheese: Freshly grated sharp cheddar gives the casserole its signature cheesy richness. It melts into the potatoes for extra flavor and texture.

Paprika: Sprinkled generously on top, paprika adds beautiful color and a hint of sweetness. (Stick with sweet paprika here—smoked paprika can overpower the mild, creamy flavor.)

Butter: A few pats of butter on top help the casserole bake into a golden, lightly crisp finish. The more butter and paprika you add, the more color and flavor you’ll get.

What’s the Difference Between Paprika and Smoked Paprika?

Paprika and smoked paprika may look similar, but their flavors couldn’t be more different. Paprika—sometimes labeled sweet paprika—is made from mild red peppers and adds bright color and gentle sweetness without changing the dish’s flavor. Smoked paprika, on the other hand, is made from peppers that have been dried over wood fires, giving it a deep, smoky flavor that can easily overpower creamy dishes like mashed potatoes. For this casserole, stick with regular sweet paprika to keep that classic buttery, savory taste.

Ingredient Substitutions & Tips

• Potatoes: Russets are ideal for that classic fluffy texture, but Yukon Golds work if you prefer a creamier, slightly richer mash. Avoid waxy potatoes like red or new potatoes—they’ll turn gummy when mashed.

• Cheese options: Sharp cheddar gives the best flavor, but feel free to mix in Monterey Jack, Gruyère, or even a little Parmesan for extra depth.

• Chives: If fresh chives aren’t available, green onions or parsley are great stand-ins. Add them after mashing to keep their fresh flavor.

• Dairy swaps: You can use full-fat Greek yogurt instead of sour cream or Neufchâtel (light cream cheese) for a lighter version that’s still creamy.

• Paprika: Sweet paprika adds that beautiful golden color without overpowering the potatoes. Skip smoked paprika unless you want a strong smoky note.

• Make-ahead tip: Assemble the casserole a day ahead, cover, and refrigerate. When ready to bake, add an extra 10–15 minutes to the baking time to ensure it’s heated through.

• Texture tip: Don’t overmix the potatoes after adding the dairy and cheese—just mash and fold gently to keep that classic mashed potato fluffiness.

How to Make Mashed Potato Casserole

Prep the potatoes: Peel and cube russet potatoes into 1- to 2-inch pieces so they cook evenly.

Boil until tender: Add the potatoes to a large pot of salted water and boil for 15–20 minutes, or until they’re easily pierced with a fork.

Drain well: Pour off all the water and return the hot potatoes to the pot or a large mixing bowl. The steam will help dry them slightly for a fluffier texture.

Mash with creamy ingredients: Add sour cream, softened cream cheese, garlic salt, salt, and black pepper. Mash until smooth and creamy.

Add flavor: Stir in the chopped chives and freshly grated cheddar cheese until evenly combined.

Spread in the casserole dish: Transfer the mashed potatoes into a greased 9×13-inch baking dish, smoothing the top with a spatula.

Top with butter and paprika: Dot the top with small pieces of butter and sprinkle generously with paprika for color and crispness.

Bake until golden: Bake at 350°F for 35–40 minutes, or until the top is golden brown and the edges are slightly bubbly.

Serve and enjoy: Let rest a few minutes, then scoop and serve warm.

Make-Ahead & Reheating

To make ahead:
Assemble the Mashed Potato Casserole completely up to the baking step. Cover tightly with foil or plastic wrap and refrigerate for up to 24 hours. When ready to bake, remove from the fridge while the oven preheats. Bake at 350°F for 45–50 minutes, or until the center is hot and the top is golden.

To reheat leftovers:
Warm individual servings in the microwave or reheat the whole casserole, covered with foil, in a 325°F oven for about 20–25 minutes. Remove the foil near the end so the top crisps slightly again.

Freezer-friendly option:
This casserole freezes beautifully. Cool completely after baking, cover tightly, and freeze for up to one month. Thaw overnight in the refrigerator, then reheat as directed above.

Serving Suggestions

• Perfect with holiday mains: Serve alongside roast turkey, glazed ham, or prime rib for Thanksgiving or Christmas—it’s the side everyone will ask for seconds.

• Everyday comfort: Pair with roasted chicken, meatloaf, or pork tenderloin for an easy weeknight dinner that feels special.

• Add a green side: A crisp salad, roasted Brussels sprouts, or simple green beans balance the richness of the casserole.

• Make it brunch-worthy: Spoon it next to breakfast sausage or baked eggs for a hearty weekend brunch.

• Top it off: Add a sprinkle of extra chives or a bit more cheddar right before serving for a fresh, melty finish.

This Mashed Potato Casserole is everything you love about classic mashed potatoes—just a little creamier, a little cheesier, and a lot more special. It’s become one of those dishes my family looks forward to every holiday, and I never mind making it because it’s simple, make-ahead friendly, and always a hit. Whether it’s part of your Thanksgiving spread or a cozy Sunday dinner, this casserole brings that comforting, homemade touch that makes every meal feel like a celebration.

For other great potato side dishes, check out my Mashed Cauliflower and Potatoes or Scalloped Hasselback Potatoes—both get rave reviews every time. Thanks for stopping by, and I hope you love this casserole as much as we do.