Cheesy Ground Beef & Potato Casserole (One-Pan Dinner!)

Nothing beats a hearty casserole that brings the whole family to the table without leaving you with a sink full of dirty dishes. This cheesy ground beef and potato casserole delivers comfort food satisfaction in one pan, making it my go-to recipe for busy weeknights when I need something filling and foolproof.

Why This Cheesy Ground Beef & Potato Casserole Works

The beauty of this dish lies in its simplicity and smart layering technique. By pre-cooking the potatoes slightly before adding other ingredients, everything finishes cooking at the same time. The cheese creates a golden, bubbly top while sealing in all the flavors underneath.

Ingredients

• 2 pounds russet potatoes, peeled and sliced into ¼-inch rounds
• 1 pound ground beef (80/20 blend)
• 1 medium yellow onion, diced (about 1 cup)
• 3 cloves garlic, minced
• 1 packet (1 oz) onion soup mix
• 1 can (10.75 oz) condensed cream of mushroom soup
• ½ cup beef broth
• 2 cups shredded sharp cheddar cheese, divided
• 1 cup shredded mozzarella cheese
• 2 tablespoons butter, cut into small pieces
• 1 teaspoon dried thyme
• ½ teaspoon paprika
• Salt and black pepper to taste
• 2 tablespoons fresh parsley, chopped (for garnish)

These ingredients work together to create layers of flavor and texture that make this casserole both satisfying and comforting.

How to Make It

1. Preheat your oven to 375°F and grease a 9×13-inch baking dish with butter or cooking spray. Set aside while you prepare the other components.
2. Wash and peel the potatoes, then slice them into uniform ¼-inch thick rounds. I use a mandoline slicer for consistency, but a sharp knife works just fine. Place the sliced potatoes in a large bowl of cold water to prevent browning while you prepare the meat mixture.
3. Heat a large skillet over medium-high heat. Add the ground beef and cook, breaking it apart with a wooden spoon, until browned and no longer pink, about 6-8 minutes. The key here is to let the meat develop some color for better flavor.
4. Add the diced onion to the same skillet with the beef. Cook for 3-4 minutes until the onion becomes translucent and fragrant. Stir in the minced garlic and cook for another 30 seconds until aromatic.
5. Sprinkle the onion soup mix over the beef mixture and stir to combine. This adds a deep, savory flavor that eliminates the need for multiple seasonings.
6. Pour in the cream of mushroom soup and beef broth, stirring until well combined. The mixture should be creamy but not too thick. Remove from heat and season with thyme, paprika, salt, and pepper to taste.
7. Drain the potatoes and pat them dry with paper towels. This step is crucial for achieving the right texture in the finished casserole.
8. Layer half of the sliced potatoes in the prepared baking dish, overlapping them slightly. Season lightly with salt and pepper.
9. Spread the entire beef mixture evenly over the first layer of potatoes, making sure to distribute it to all corners of the dish.
10. Layer the remaining potatoes over the beef mixture, again overlapping slightly for even coverage. Dot the top with butter pieces, which will help the potatoes brown beautifully.
11. Cover the dish tightly with aluminum foil and bake for 45 minutes. This initial covered baking allows the potatoes to steam and become tender.
12. Remove the foil and sprinkle 1 cup of cheddar cheese evenly over the top. Return to the oven, uncovered, for 15 minutes.
13. Add the remaining cheddar cheese and all of the mozzarella cheese on top. Bake for another 15-20 minutes until the cheese is melted, bubbly, and golden brown on top.
14. Let the casserole rest for 10 minutes before serving. This allows the layers to set and makes serving much easier.
15. Garnish with fresh chopped parsley before serving for a pop of color and fresh flavor.

This method ensures tender potatoes, flavorful meat, and a beautifully melted cheese topping that brings everything together in one satisfying dish.

Nutrition at a Glance

• High in protein from ground beef and cheese
• Good source of potassium from potatoes
• Provides calcium from dairy ingredients
• Contains iron from the ground beef
• Offers complex carbohydrates for sustained energy
• Moderate calorie density makes it filling without being overly heavy
• Contains vitamin C from potatoes and onions
• Provides B vitamins from meat and dairy

How to Serve It

• Pair with a simple green salad dressed with vinaigrette to cut through the richness
• Serve alongside steamed broccoli or green beans for added vegetables
• Offer with crusty bread or dinner rolls for sopping up any extra sauce
• Complement with roasted Brussels sprouts or asparagus when in season
• Serve with a dollop of sour cream for extra creaminess
• Add a side of coleslaw for a fresh, crunchy contrast
• Include pickles or pickled vegetables to balance the rich flavors

The key is balancing this hearty casserole with lighter, fresher sides that provide textural and flavor contrast.

Common Mistakes

• Slicing potatoes too thick, which results in uneven cooking and tough texture
• Skipping the potato soaking step, leading to discolored and starchy results
• Not draining ground beef properly, creating a greasy finished dish
• Adding all the cheese at once, which can cause burning before the interior is properly heated
• Using potatoes that are too old or sprouted, resulting in poor texture and flavor
• Not letting the casserole rest after baking, making it difficult to serve neatly
• Overcooking the initial beef mixture, which can make the meat tough and dry
• Using pre-shredded cheese exclusively, which doesn’t melt as smoothly as freshly grated
• Not seasoning the potato layers individually, missing opportunities for flavor development

Avoiding these pitfalls will help ensure your casserole turns out creamy, flavorful, and with the ideal texture every time.

Storage and Reheating

• Store covered in the refrigerator for up to 4 days
• Wrap individual portions in plastic wrap for easy reheating
• Freeze for up to 3 months in a freezer-safe container
• Thaw overnight in the refrigerator before reheating
• Reheat in a 350°F oven for 20-25 minutes until heated through
• Cover with foil while reheating to prevent the top from over-browning
• Microwave individual portions for 2-3 minutes, stirring halfway through
• Add a splash of broth or milk when reheating if the mixture seems dry
• Let reheated portions rest for 2-3 minutes before serving to avoid burning your mouth

Proper storage and gentle reheating help maintain the casserole’s creamy texture and prevent the cheese from becoming rubbery.

Leftover Ideas

• Transform into breakfast hash by adding scrambled eggs and serving with toast
• Use as a filling for baked potatoes, topped with additional cheese and green onions
• Create casserole-stuffed peppers by hollowing out bell peppers and filling with the mixture
• Make shepherd’s pie by adding frozen mixed vegetables and topping with mashed potatoes
• Turn into soup by adding extra broth, diced tomatoes, and additional vegetables
• Use as a base for loaded potato skins by scooping into crispy potato shells
• Create quesadillas by using the mixture as filling between tortillas with extra cheese
• Make stuffed mushrooms using large portobello caps as vessels for the leftover mixture
• Transform into a hearty pasta sauce by adding it to cooked penne or rotini

These creative leftover applications ensure that no delicious portion goes to waste and provide variety throughout the week.

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