The Ultimate Loaded Baked Potato Salad Casserole Recipe for Easy Entertaining

Are you searching for the perfect side dish that combines the comfort of mashed potatoes with all the fixings of a loaded baked potato? This Loaded Baked Potato Salad Casserole is the answer, transforming classic flavors into a warm, creamy, and utterly satisfying bake. It’s truly a guaranteed crowd-pleaser for potlucks, holiday dinners, or a hearty weeknight meal.

Why You Will Love This Recipe

This Loaded Baked Potato Salad Casserole is the ultimate comfort food mashup you never knew you needed. Instead of dealing with individual potato skins or chilled salad, this recipe delivers all those beloved flavors—sharp cheddar, crispy bacon, tangy sour cream, and chives—baked into a warm, cheesy, and indulgent casserole. It holds up wonderfully on a buffet table, making it perfect for entertaining, and repurposes leftovers like a dream. Plus, it manages to incorporate all those decadent baked potato toppings into one cohesive, flavor-packed dish.

Ingredients

• 4 lbs Russet potatoes, peeled and diced
• 1 cup milk (whole or 2%)
• 4 tablespoons unsalted butter
• 1 teaspoon salt, plus more for boiling
• 1/2 teaspoon black pepper
• 8 slices bacon, cooked until crisp and crumbled
• 1 cup shredded sharp cheddar cheese, divided
• 1 cup sour cream
• 1/2 cup heavy cream
• 4 green onions (scallions), thinly sliced (divided for mixing and topping)
• 1/2 teaspoon garlic powder

Step-by-Step Instructions

1. Preheat your oven to 375°F (190°C). Lightly grease a 9×13 inch baking dish.
2. Place the peeled and diced potatoes in a large pot and cover them with cold, salted water. Bring to a boil and cook until the potatoes are fork-tender, about 15-20 minutes. Drain the potatoes thoroughly.
3. Return the drained potatoes to the hot empty pot. Mash the potatoes until mostly smooth.
4. Add the milk, butter, 1 teaspoon of salt, and black pepper to the mashed potatoes. Stir until the butter is melted and the mixture is creamy.
5. In a large bowl, combine the mashed potatoes, crumbled cooked bacon, 3/4 cup of the shredded cheddar cheese, sour cream, heavy cream, garlic powder, and half of the sliced green onions. Mix gently until everything is just combined. Be careful not to overmix, or the potatoes can become gluey.
6. Spread the potato mixture evenly into the prepared 9×13 inch baking dish.
7. Top the casserole evenly with the remaining 1/4 cup of shredded cheddar cheese.
8. Bake for 20-25 minutes, or until the casserole is heated through and the cheese on top is melted and lightly golden brown.
9. Remove from the oven and let it rest for 5 minutes before garnishing with the remaining sliced green onions.

Expert Tips / Pro Tips

Ensure your potatoes are completely drained before mashing; excess water is the enemy of a thick, delicious casserole texture. Using Russet potatoes is highly recommended because their high starch content yields that fluffy, classic baked potato texture when mashed. For an extra layer of smoky flavor, consider using smoked cheddar cheese in place of some of the sharp cheddar. If you like a tangier flavor profile, substitute Greek yogurt for half of the sour cream measurement. When baking, placing the rack in the middle of the oven ensures even cooking and browning.

Variations & Substitutions

For a heartier meal, add 1 cup of cooked, shredded chicken or cooked ground beef mixed into the potato base before baking. If you prefer a little zing, you can add a tablespoon of prepared horseradish to the sour cream mixture. For a different cheese profile, swap out the cheddar for Colby Jack or Monterey Jack. If you are out of heavy cream, you can substitute it with more milk, though the casserole may be slightly less rich. Fresh chives are traditional, but a sprinkle of dried onion flakes can be added for a less overpowering onion flavor.

Serving Suggestions

This Loaded Baked Potato Salad Casserole is hearty enough to stand as a main course, especially when topped with an extra dollop of sour cream. However, it truly shines as an indulgent side dish. Pair it with grilled steak, slow-cooked pulled pork, or simple roasted chicken. It also complements holiday meals wonderfully, serving as a warm alternative to traditional potato salad alongside ham or turkey. A simple side salad with a vinaigrette dressing helps cut through the richness.

Storage, Freezing & Reheating

This casserole stores wonderfully. Cover leftovers tightly with foil or plastic wrap and refrigerate for up to 3 to 4 days. To reheat, cover the dish loosely with foil and bake at 350°F (175°C) for about 15-20 minutes, or until heated through. For freezing, it is best to freeze the casserole *before* baking, if possible. Wrap the unbaked, assembled casserole tightly in two layers of plastic wrap and then foil. Freeze for up to 3 months. Thaw overnight in the refrigerator before baking according to the original directions, adding an extra 10-15 minutes to the bake time.

Nutrition Information

The following is an estimated nutritional breakdown per serving (based on 8 servings). Actual values may vary based on specific ingredient brands and portion sizes.

Nutrient	Amount
Calories	420 kcal
Total Fat	25g
Saturated Fat	14g
Cholesterol	70mg
Sodium	550mg
Total Carbohydrates	40g
Dietary Fiber	4g
Sugars	3g
Protein	12g

FAQ

Can I make this casserole ahead of time?

Yes, absolutely. You can assemble the entire casserole, cover it, and refrigerate it for up to 24 hours before you plan to bake it. You may need to add 5-10 minutes to the total baking time if baking directly from the refrigerator.

Should I use leftover baked potatoes for this recipe?

While you can technically use leftover fully baked potatoes, this recipe is optimized for boiling and mashing the potatoes directly in the casserole structure. If using pre-baked potatoes, ensure you scoop out about 4 lbs of the flesh and mash it according to the initial steps, but skip the boiling time.

What is the best type of potato for this casserole?

Russet potatoes are the preferred variety because they are starchy and fluff up beautifully when mashed, replicating the texture of a classic baked potato. Yukon Golds are an acceptable substitute if you prefer a slightly creamier, richer base.

Why did my casserole turn out watery?

The most common cause of a watery casserole is failing to drain the boiled potatoes thoroughly. Always let the drained potatoes sit in the hot, empty pot for a minute or two to allow excess steam and moisture to escape before you begin mashing and mixing in the liquids.