Loaded Mashed Potato Casserole Recipe

This Loaded Mashed Potato Casserole is pure comfort in every bite: think fluffy, buttery potatoes whipped with sour cream, topped with gooey cheese and crispy bacon, all baked together into one irresistibly cozy dish. Whether you’re gearing up for a holiday, a family gathering, or just want to treat yourself to something decadently delicious, this casserole always has people coming back for seconds. The magic lies in how each simple ingredient transforms into something greater when they all come together — and, trust me, once you try it, Loaded Mashed Potato Casserole will find a permanent spot in your recipe rotation!

Ingredients You’ll Need

One of the best things about this recipe is how a handful of classic ingredients can create such a rich and satisfying experience. Every item brings a needed element, from creaminess and nostalgia to savory crunch, and each contributes to the beautiful balance that’s the hallmark of a great Loaded Mashed Potato Casserole.

• Russet potatoes: The starchy texture is ideal for creating the ultimate creamy mash that’s the base of this casserole.
• Salt: Essential for seasoning your potatoes both during and after boiling, bringing out all the flavors.
• Milk (whole or 2%): Adds moisture and lightness, making sure every bite is luxuriously fluffy.
• Unsalted butter: Infuses the mash with rich, silky smooth flavor that screams comfort food.
• Sour cream: The secret to that slight tang and extra creaminess that takes mashed potatoes over the top.
• Colby Jack cheese (freshly shredded): Melts perfectly for a bubbly, cheesy topping and provides a bit of color too.
• Bacon (chopped): Adds unbeatable smoky flavor and a delightful crunch to contrast the softness of the potatoes.
• Green onion or chives (to garnish): Brings a fresh pop of color and a gentle oniony bite that cuts through the richness just right.

How to Make Loaded Mashed Potato Casserole

Step 1: Cook the Potatoes

Start by preheating your oven to 375˚F. In a large pot, add your peeled and cubed russet potatoes and cover them with enough water so they’re submerged. Bring the pot to a boil over medium-high heat, then reduce the heat to medium, seasoning the water with one teaspoon of salt. Let the potatoes simmer until they’re fork-tender and can be easily pierced with a knife. Once done, drain them well — this makes sure your mash won’t be watery later on.

Step 2: Make the Butter and Milk Mixture

While the potatoes are boiling away, set a small saucepan on the stove and combine the butter and milk. Heat gently until the butter has fully melted, and then turn off the heat, leaving the pan on the stovetop to keep the mixture warm. Whisk in the sour cream until smooth — this is what’s going to make your Loaded Mashed Potato Casserole decadent and creamy!

Step 3: Mash and Mix the Potatoes

Now for the fun part: mash your hot potatoes using a potato masher or electric mixer until they reach your preferred level of creaminess. Pour in the warm milk-butter-sour cream mixture and beat everything together until fully incorporated. This step is crucial for the dreamy, cloud-like potato layer that defines this casserole. Spoon the mashed potatoes into a baking dish, spreading them evenly.

Step 4: Prepare the Bacon Topping

Set a skillet over medium heat and add your chopped bacon. Cook, stirring occasionally, until the bacon is beautifully golden and crispy — the aroma alone will have everyone hovering in the kitchen. Drain off any excess fat, then scatter the bacon evenly across the top of the mashed potatoes. Sprinkle the freshly shredded Colby Jack cheese on top, turning this dish into the ultimate marriage of cheesy and savory flavors.

Step 5: Bake to Perfection

Cover your baking dish with foil and slide it into the hot oven. Bake for 25 minutes, allowing everything to heat together and the flavors to meld. Remove the foil and continue baking for another 10 minutes. The cheese should be bubbling and irresistibly melty — exactly as a Loaded Mashed Potato Casserole should look when it’s ready to hit the table.

How to Serve Loaded Mashed Potato Casserole

Garnishes

This casserole comes to life with a finishing sprinkle of fresh green onions or chives just before serving. They offer a burst of color while their mild onion flavor brightens the whole dish. For special occasions, you can even add a dollop of sour cream or a dash of black pepper or paprika on top for a little extra flair.

Side Dishes

Loaded Mashed Potato Casserole is hearty enough to star on its own, but it also makes the ultimate side for roasted meats, barbecue, or classic comfort mains like meatloaf or roast chicken. Pair it with a green salad or some simple steamed veggies to balance its rich, creamy goodness.

Creative Ways to Present

If you’re entertaining, try dividing the mashed potato mixture into individual ramekins for a personalized touch. You can even set up a “loaded” toppings bar with crumbled bacon, different cheeses, scallions, and hot sauce, letting guests customize their own casserole experience — it’s always a hit at gatherings!

Make Ahead and Storage

Storing Leftovers

Place any leftover Loaded Mashed Potato Casserole in an airtight container and store it in the refrigerator. It’ll keep for up to 3 days, and honestly, it tastes just as dreamy reheated for lunch or dinner the next day — almost like the flavors deepen overnight.

Freezing

This casserole is freezer friendly! After baking and cooling, transfer portions to airtight containers or wrap the entire dish thoroughly. It will stay fresh in the freezer for up to 2 months. When the craving strikes, just thaw it in the fridge overnight before reheating.

Reheating

To reheat, cover with foil and bake at 350˚F until hot throughout (about 20-25 minutes if baking a whole casserole, less for individual portions). For extra crispy cheese on top, remove the foil for the last few minutes. The microwave works in a pinch, too — just use a microwave-safe dish and heat in short increments, stirring occasionally.

FAQs

Can I make Loaded Mashed Potato Casserole ahead of time?

Absolutely! You can assemble the entire casserole ahead of time (hold off on baking) and store it in the refrigerator for up to 24 hours before you plan to serve. When ready, bake as directed, adding a few extra minutes for a straight-from-the-fridge casserole.

What’s the best way to mash the potatoes for this casserole?

A potato masher works perfectly for a rustic, slightly textured mash, but if you crave that ultra-smooth and creamy finish, an electric hand mixer does wonders. Either way, be careful not to over-mix, which can make potatoes gluey.

Can I use a different cheese?

Definitely! While Colby Jack is wonderfully melty and mild, feel free to swap in sharp cheddar, Monterey Jack, or even pepper jack for a little heat. A mix of cheeses can elevate your Loaded Mashed Potato Casserole with new flavors and colors.

Is it possible to make it vegetarian?

Of course! Just omit the bacon and sprinkle on some extra cheese or sautéed mushrooms for added savory depth. You can also try vegetarian bacon or other plant-based toppings to suit your needs.

How can I add more flavor?

Try stirring roasted garlic into the mashed potato base, mixing in herbs like thyme or parsley, or adding a dash of hot sauce for a bit of a kick. The casserole is very adaptable, and a few tweaks can really make your version unique!

Final Thoughts

If you’re craving a side dish that’s guaranteed to wow a crowd or simply want some good old-fashioned comfort food, you truly can’t go wrong with Loaded Mashed Potato Casserole. It’s cozy, crowd-pleasing, and pure joy from the very first bite — give it a try and watch it disappear!

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