Loaded Baked Potato Casserole with Fried Onions
Easy Loaded Baked Potato Casserole is one of those easy side dishes that always earns a spot on the dinner table. Some side dishes quietly sit on the table, and some have everyone asking for a second spoonful before dinner is over. With its creamy texture and crispy fried onion topping, this casserole is the kind of recipe guests remember long after the meal ends.
My loaded mashed potato casserole feeds a crowd with minimal effort. It’s easy to make ahead and fits right in with both holiday meals and everyday dinners.
Growing up, mashed potatoes were creamy, buttery, and full of little potato chunks, and that’s the way I learned to love them, lumps and all. My Loaded Baked Potato Casserole with Fried Onions starts with that classic family recipe and adds all the toppings you’d expect on a loaded baked potato for a side dish that’s always a hit at family dinners and holiday meals.
I’ve never met a potato recipe I didn’t like, whether it’s a bowl of classic mashed potatoes, a serving of Slow Cooker Loaded Potatoes, or Cheesy Scallop Potatoes. This casserole takes what I love about each of them and turns it into a side dish that’s hard to resist.
Easy Loaded Baked Potato Casserole
Yukon Gold potatoes, sour cream, cheddar cheese, and bacon come together in a casserole that balances creamy and crunchy textures. The potatoes are mashed by hand, leaving some texture rather than a perfectly smooth consistency, while the cheese melts throughout as it bakes.
French-fried onions provide a crisp topping without overwhelming the potatoes underneath. Finished with reserved bacon and green onions, the casserole brings together the flavors of a baked potato in an easy-to-serve dish.
Timesaving Tips and Variations
This recipe is easy to customize based on what you have on hand and how much prep time you want to spend in the kitchen. Whether you’re making it for a holiday meal or a family dinner, a few simple adjustments can help you get the dish on the table a bit quicker.
- Cook the bacon ahead: Prepare and crumble the bacon a day or two in advance and refrigerate until needed. Fully cooked bacon also works well.
- Peel potatoes ahead: Keep them submerged in cold water in the refrigerator overnight, then drain before cooking in fresh water.
- Start with less milk: Add the initial amount, then use a little more only if the potatoes are too stiff to spread.
- Leave some texture: Mash the potatoes by hand and stop when they’re mostly creamy with a few small lumps remaining.
- Try another cheese: Replace part of the cheddar with Monterey Jack or Colby Jack.
- Leave a little skin: Scrub the potatoes well and leave some skin on if you like that texture.
- Use chives: Swap them for the green onions for a milder finish.
- Make it meatless: Leave out the bacon and taste the potato mixture before adjusting the salt.
These changes won’t dramatically alter the casserole, but they can help you adjust it to fit your schedule or your family’s preferences.
What to Serve with Loaded Baked Potato Casserole
The creamy potatoes, cheddar cheese, bacon, and crispy onion topping pair well with a variety of main dishes. For a complete meal, add a simple vegetable or fresh salad alongside the casserole.
- Slow Cooker Spiral Ham
- Breaded Chicken Cutlets
- Easy Herb and Butter Oven Roasted Turkey
- Instant Pot Beef Tips and Gravy
- Green Beans with Toasted Walnuts
The casserole is rich enough to hold its own alongside simple main dishes. That’s one reason it fits so easily into a variety of menus.
Frequently Asked Questions
Yes, assemble it through the cheese topping up to one day ahead, then cover and refrigerate. Bake it covered at 375°F until hot in the center, allowing extra time because it starts cold and following your baking dish’s instructions for refrigerator-to-oven use. Uncover, add the French fried onions, and bake for another 5–8 minutes before finishing with the reserved bacon and green onions.
Peel the Yukon Gold potatoes if you prefer a smoother mash. Their thin skins can also be left on, or you can peel only some of the potatoes. Scrub them well before cutting if you leave any skin on.
Refrigerate leftovers in a covered container within two hours and use them within 3–4 days. Reheat individual portions in the microwave or a covered baking dish in the oven until they reach 165°F in the center, adding a small splash of milk if needed.
You can freeze the potato base, although thawed potatoes may have a slightly different texture. Cool it promptly, package it in freezer-safe containers without the fried onions or fresh garnish, and freeze for up to two months for best quality. Thaw overnight in the refrigerator, reheat covered until the center reaches 165°F, and add the toppings at the end.
Recommended Kitchen Tools
You only need a few basic kitchen tools for this recipe. Have your baking dish ready before you begin mashing so you can transfer the mixture while it’s warm.
- Large Pot
- Colander
- Potato Masher
- Measuring Cups and Spoons
- Cheese Grater
- Large Spoon or Spatula
- 9 × 13-Inch Baking Dish
Ingredients for Loaded Baked Potato Casserole
Each ingredient contributes to the balance of creamy, cheesy, and crunchy textures in the finished casserole. Together, they create a side dish that feels familiar while offering a little more flavor and texture than traditional mashed potatoes.
- Yukon Gold potatoes: Create a creamy base with a few small lumps for texture.
- Butter, milk, and sour cream: Add richness and help create a smooth, creamy consistency.
- Sharp cheddar cheese: Mixed into the casserole and sprinkled on top before baking.
- Bacon: Adds savory flavor throughout the dish and as a garnish.
- Seasonings: Onion powder, kosher salt, and black pepper enhance the flavor of the potatoes.
- French fried onions: Create the crispy topping.
- Green onions: Add a fresh finish before serving.
Steps to Make Baked Potato Casserole
Heat the oven to 375°F and grease a 9 × 13-inch baking dish. Cut the potatoes into even pieces and boil in water until fork-tender. Drain well, return the potatoes to the warm pot briefly. Mash with the butter, warm milk, sour cream, and seasonings, leaving a few small lumps.
Fold in most of the cheddar and bacon. Spread in the baking dish and sprinkle with the remaining cheese. Bake until hot, then add the French fried onions for the last 5–8 minutes. Finish with the reserved bacon and green onions or chives, then serve warm.
We enjoy this casserole year-round and especially with the Best Oven Pot Roast that my family requests often. If you try it, leave a comment and a rating to let me know how it turned out!
Loaded Baked Potato Casserole with Fried Onions
Equipment
- large saucepan
Ingredients
- 4 pounds Yukon Gold potatoes
- 1 stick 8 tablespoons butter
- ¼ to ½ cup whole milk warmed
- ¾ cup sour cream
- 2 cups shredded sharp cheddar cheese divided
- 8 slices bacon cooked and crumbled, divided
- ½ teaspoon onion powder
- 1 teaspoon kosher salt plus more for the cooking water
- ½ teaspoon black pepper
- 1½ cups French fried onions
- ⅓ cup sliced green onions
Instructions
- Heat the oven to 375°F and grease a 9 × 13-inch baking dish. Peel the potatoes, or leave some skin on if preferred, and cut into even 1-inch pieces. Place in a large pot, cover with cold water. Bring to a boil, then reduce the heat and simmer until fork-tender, about 15–20 minutes.
- Drain well and return the potatoes to the warm pot over low heat for about a minute, stirring gently to let excess moisture evaporate. Remove from the heat. Add the butter, ¼ cup warm milk, sour cream, onion powder, salt, and pepper. Mash until mostly creamy, leaving a few small lumps. Add the remaining milk a tablespoon at a time only if needed.
- Fold in 1½ cups cheddar and about two-thirds of the bacon. Taste and adjust the seasoning. Spread the potatoes in the prepared baking dish and sprinkle with the remaining ½ cup cheddar.
- Bake uncovered for about 20 minutes, or until hot in the center and the cheese is melted. Sprinkle the French fried onions over the top and bake for another 5–8 minutes, watching so the onions don’t get too dark. Sprinkle with the reserved bacon and the green onions or chives just before serving.
Notes
- Weigh the potatoes if possible; the number varies with their size.
- These baking times are for a freshly assembled, warm casserole. A refrigerated casserole needs longer to heat through before the fried onions are added.
- When making ahead, reserve the topping bacon separately in the refrigerator and reheat it before adding.
Nutritional Disclaimer
“Blogghetti” is not a dietician or nutritionist, and any nutritional information shared is an estimate. If calorie count and other nutritional values are important to you, we recommend running the ingredients through whichever online nutritional calculator you prefer. Calories and other nutritional values can vary quite a bit depending on which brands were used.
More Side Dishes to Enjoy
- Roasted Mushrooms from Hezzi-D’s Recipe Box
- Roasted Delicata Squash and Sweet Potatoes with Cranberry Glaze from A Day in the Life on a Farm
- Parmesan Butternut Squash from Jolene’s Recipe Journal
- Homemade Mushroom Rice Pilaf fromA Kitchen Hoor’s Adventures
- Gluten Free Magic Chicken Bites from Sneha’s Recipe
- Sausage Tortellini Soup from Art of Natural Living
- Beer Macaroni and Cheese from The Spiffy Cookie
- Jalapeno Cheddar Swirls from Magical Ingredients
- Potato, Corn, & Pepper Skillet with Pancetta from Karen’s Kitchen Stories
Enjoy!
