If you’re searching for a soul-satisfying side dish that delivers big on flavor and comfort, you’ve found it in this Loaded Mashed Potato Casserole Recipe. Imagine creamy, velvety mashed potatoes packed full of sharp cheddar, tangy sour cream, and a medley of irresistible mix-ins, all baked to bubbly, golden perfection. This casserole is the ultimate crowd-pleaser that transforms humble potatoes into a festive dish your family and friends will keep asking for. Whether it’s game day, a holiday meal, or just a cozy weeknight, this recipe hits every note to make your table feel like a warm hug.
Ingredients You’ll Need
Don’t let the simplicity of the ingredients fool you — each one plays a vital role in creating the perfect balance of flavor, creaminess, and texture in this Loaded Mashed Potato Casserole Recipe. From the velvety butter to the sharp cheddar that melts beautifully, every component contributes to the magic of this dish.
- 5 pounds Russet potatoes peeled and cubed: These starchy potatoes mash up to a fluffy, creamy base essential for the casserole’s texture.
- 1 cup Sour cream (full-fat or Greek yogurt substitute): Adds richness and a slight tang that brightens the flavor.
- ½ cup Butter (softened, unsalted): Provides that luscious creaminess every good mashed potato needs.
- 1 cup Whole milk (warmed): Helps achieve a smooth, silky mash without watering it down.
- 2 teaspoons Garlic powder: Infuses deep, comforting flavor without overpowering the other ingredients.
- 1.5 teaspoons Salt (to taste): Essential for bringing all the flavors together.
- ½ teaspoon Black pepper (freshly ground): Adds a subtle bite and rounds out the seasoning.
- 2 cups Sharp cheddar cheese (shredded, divided): Half goes into the mash, and half tops the casserole for that irresistible golden crust.
- 4 Green onions (chopped): Offer fresh, mild onion flavor and a pop of color.
- ½ cup Sour cream (for topping): Gives the casserole a tangy finish and helps keep the cheese topping moist.
- 1 cup Cream cheese (optional, for extra creaminess): Makes the dish ultra-rich and indulgent.
- 1 packet Ranch seasoning mix (optional): Adds a zesty twist if you’re craving something a little different.
- 1 Jalapeño (diced, optional): Kicks up the heat with a fresh, spicy punch for adventurous eaters.
How to Make Loaded Mashed Potato Casserole Recipe
Step 1: Prepare the Potatoes
Start by peeling and cubing those Russet potatoes into evenly sized pieces. Boil them in salted water until they’re fork-tender, about 15 to 20 minutes. This step ensures a smooth, uniform texture in your mashed potatoes, setting the foundation for the whole casserole.
Step 2: Mash and Mix
Drain the potatoes well, then return them to the pot or a large bowl. Add the softened butter, warmed milk, and sour cream, then mash away until the mixture is perfectly creamy and lump-free. Stir in the garlic powder, salt, black pepper, and half of the shredded sharp cheddar cheese for that signature cheesy depth. If you’re using cream cheese and ranch seasoning, fold them in now to amplify the flavor and richness.
Step 3: Add the Fresh Touch
Fold in the chopped green onions and diced jalapeños if you like a little heat. These fresh additions bring brightness and contrast to the creamy base, balancing the indulgence with a subtle crunch and spice.
Step 4: Assemble the Casserole
Transfer this heavenly mashed potato mixture into a 9×13-inch baking dish, smoothing the top out evenly. Then, spread the remaining shredded cheddar cheese generously over the surface, followed by dollops of sour cream. This layering locks in moisture and creates a golden, bubbling topping once baked.
Step 5: Bake to Perfection
Bake your loaded mashed potato casserole in a preheated 350°F oven for 25 to 30 minutes. You want the cheese to melt fully and develop a slightly golden crust. Once out of the oven, let it rest for 10 minutes — this helps the casserole set a little, making it easier to serve while keeping it warm and inviting.
How to Serve Loaded Mashed Potato Casserole Recipe
Garnishes
To really elevate this classic dish, fresh garnishes are a must. Sprinkle chopped green onions or crispy bacon bits on top for an extra layer of flavor and texture. A light drizzle of sour cream or even a few chives adds a fresh, tangy burst that complements the rich, cheesy potatoes beautifully.
Side Dishes
This casserole pairs like a dream with hearty mains like roast chicken, grilled steak, or savory meatloaf. To keep the meal balanced, consider serving it alongside steamed veggies or a crisp green salad. The creamy, cheesy texture of the potatoes contrasts perfectly with light, fresh sides.
Creative Ways to Present
Fancy a twist? Try serving this casserole in individual ramekins for a charming personal touch. Or layer it with cooked bacon and caramelized onions between mashed potato layers for a spectacular showstopper. You can also add different cheeses or swap jalapeños for roasted red peppers to change the flavor profile and keep things exciting each time you make it.
Make Ahead and Storage
Storing Leftovers
You can keep any leftover Loaded Mashed Potato Casserole Recipe in an airtight container in the refrigerator for up to 3 to 4 days. Before storing, allow the casserole to cool completely to avoid excess moisture buildup, which can make the dish watery when reheated.
Freezing
This casserole freezes wonderfully, making it a perfect make-ahead dish. Wrap it tightly with plastic wrap and aluminum foil or transfer to a freezer-safe container. It can be frozen for up to 2 months. When ready to enjoy, thaw overnight in the refrigerator for best results.
Reheating
Reheat leftovers in the oven at 350°F until warmed through and bubbly, usually 20 to 25 minutes. For quicker reheating, you can microwave individual portions, but the oven method preserves the casserole’s texture and that gorgeous cheesy top.
FAQs
Can I use other types of potatoes for this recipe?
While Russet potatoes are ideal for their starchy texture that yields fluffy mashed potatoes, you can use Yukon Gold if you prefer a creamier, buttery finish. Just keep in mind the texture and flavor will be slightly different but still delicious.
Is there a way to make this casserole healthier?
Absolutely! You can swap full-fat sour cream for Greek yogurt, use reduced-fat cheese, and substitute whole milk with skim or plant-based milk to lighten things up without sacrificing too much creaminess or taste.
Can I add meat to this Loaded Mashed Potato Casserole Recipe?
Yes! Adding cooked bacon bits, diced ham, or even shredded rotisserie chicken can turn this side dish into a hearty main course. Just fold the meat into the mashed potatoes before baking for a protein boost.
What can I use instead of sour cream?
If you don’t have sour cream on hand, plain Greek yogurt is an excellent substitute that provides tang and creaminess. Just make sure it’s well-stirred into the potatoes for a smooth texture.
How do I get the cheese on top perfectly golden?
For a beautifully golden cheese crust, you can switch your oven to broil for the last 2 to 3 minutes of baking. Watch carefully to avoid burning. This step adds a kiss of crispiness that’s hard to resist.
Final Thoughts
There’s truly nothing like the comforting, hearty satisfaction of this Loaded Mashed Potato Casserole Recipe. It’s a tried and true dish that brings together all the flavors and textures we crave in a side dish, with room for your personal flair. Whether you stick with the classic version or experiment with creative twists, this casserole will quickly become one of your go-to favorites to share and savor. So grab those potatoes, turn on your oven, and get ready to make some delicious memories!
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Loaded Mashed Potato Casserole Recipe
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Total Time: 50 minutes
- Yield: 10 servings
- Category: Side Dish
- Method: Baking
- Cuisine: American
Description
This Loaded Mashed Potato Casserole is a creamy, cheesy comfort food classic featuring tender mashed russet potatoes blended with sour cream, butter, and sharp cheddar, all baked to a golden, bubbly perfection. Enhanced with green onions, garlic powder, and optional add-ins like ranch seasoning and jalapeños, this savory casserole makes an irresistible side dish for any family dinner or holiday feast.
Ingredients
Main Ingredients
- 5 pounds Russet potatoes, peeled and cubed
- 1 cup Sour cream (full-fat or Greek yogurt substitute)
- ½ cup Butter, softened and unsalted
- 1 cup Whole milk, warmed
- 2 teaspoons Garlic powder
- 1.5 teaspoons Salt, to taste
- ½ teaspoon Black pepper, freshly ground
- 2 cups Sharp cheddar cheese, shredded, divided
- 4 Green onions, chopped
- ½ cup Sour cream, for topping
- 1 cup Cream cheese, optional, for extra creaminess
- 1 packet Ranch seasoning mix, optional
- 1 Jalapeño, diced, optional
Instructions
- Boil Potatoes: Place the peeled and cubed russet potatoes into a large pot of salted water and bring to a boil. Cook until the potatoes are tender when pierced with a fork, about 15-20 minutes. Drain well.
- Mash Ingredients: Mash the drained potatoes in a large mixing bowl until smooth. Add the softened butter, warmed milk, sour cream, garlic powder, salt, and freshly ground black pepper. Stir thoroughly until the mixture is creamy and well combined.
- Add Cheese and Mix-ins: Stir in 1 cup of shredded sharp cheddar cheese along with chopped green onions. If using, also fold in the cream cheese and ranch seasoning mix at this stage for added richness and flavor. Optionally, add diced jalapeños for a spicy kick.
- Prepare for Baking: Transfer the mashed potato mixture into a greased 9×13-inch baking dish, spreading it evenly. Top with the remaining 1 cup of shredded sharp cheddar cheese and a dollop of sour cream.
- Bake Casserole: Bake the casserole in a preheated oven at 350°F (175°C) for 25–30 minutes until the cheese topping is melted, golden, and bubbling.
- Cool and Serve: Remove the casserole from the oven and let it cool for 10 minutes before serving to allow the flavors to meld together and the casserole to set.
Notes
- You can use Greek yogurt instead of sour cream for a tangy twist and lighter option.
- Add cooked, crumbled bacon on top before baking for extra smokiness and texture.
- Adjust the seasoning to taste, especially salt and pepper, depending on your preference and the saltiness of the cheese and seasoning mix.
- For extra creaminess, include the optional cream cheese in the mash.
- To make this dish spicier, add more diced jalapeños or a dash of hot sauce.
- Leftovers can be refrigerated for up to 3 days and reheated in the oven or microwave.
