Warm, cheesy, and packed with hearty flavor, this Ground Beef Casserole is the ultimate comfort food dinner. Featuring seasoned ground beef, colorful bell peppers, a creamy mushroom sauce, and layers of melted cheese, this family-friendly casserole is simple to prepare and always a crowd-pleaser.

Perfect for busy weeknights, potlucks, or cozy weekend meals, this recipe combines classic ingredients into a rich and satisfying dish that everyone will be asking for again. Whether you choose pasta or rice as the base, every bite is loaded with savory beef, creamy goodness, and gooey melted cheese.

The best part? Everything comes together in one baking dish, making cleanup easy while delivering a meal that tastes like it took hours to prepare.

Why You’ll Love This Recipe

• Easy and budget-friendly family dinner
• Loaded with hearty ground beef and vegetables
• Rich, creamy, and cheesy in every bite
• Great for meal prep and leftovers
• Customizable with your favorite vegetables
• Perfect comfort food for any season

 Ingredients

For the Casserole

• 1 lb ground beef
• 1 medium onion, finely chopped
• 1 green bell pepper, diced
• 1 red bell pepper, diced
• 2 cups shredded cheddar cheese, divided
• 1 cup shredded mozzarella cheese
• 1 can (10.5 oz) cream of mushroom soup
• ½ cup sour cream
• ½ tsp garlic powder
• ½ tsp onion powder
• ½ tsp salt
• ¼ tsp black pepper
• 3 cups cooked pasta or cooked rice (optional)
• 1 tbsp olive oil or butter

👩‍🍳 How to Make Ground Beef Casserole

Step 1: Preheat the Oven

Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish and set it aside.

Step 2: Brown the Ground Beef

Heat the olive oil or butter in a large skillet over medium heat. Add the ground beef and cook until fully browned, breaking it apart into crumbles as it cooks.

Once browned, drain any excess grease from the skillet.

Step 3: Cook the Vegetables

Add the chopped onion, green bell pepper, and red bell pepper to the skillet.

Cook for 3–4 minutes, stirring occasionally, until the vegetables begin to soften and become fragrant.

Step 4: Season the Mixture

Sprinkle in the garlic powder, onion powder, salt, and black pepper.

Stir thoroughly to ensure the seasonings are evenly distributed throughout the beef and vegetables.

Step 5: Create the Creamy Sauce

In a medium bowl, combine the cream of mushroom soup and sour cream until smooth.

Pour the mixture into the skillet and stir until everything is coated in a rich, creamy sauce.

Allow the mixture to cook for another minute or two so the flavors can blend together.

Step 6: Assemble the Casserole

If using pasta or rice, spread half into the bottom of the prepared baking dish.

Spoon half of the beef mixture over the base layer.

Sprinkle with half of the cheddar cheese and half of the mozzarella cheese.

Repeat the layers with the remaining pasta or rice, beef mixture, and finish with the remaining cheese on top.

Step 7: Bake Until Golden

Place the casserole in the preheated oven and bake for 20–25 minutes.

The casserole is ready when the cheese is completely melted, bubbly, and lightly golden around the edges.

Step 8: Rest and Serve

Remove the casserole from the oven and allow it to rest for 5 minutes before serving.

This helps the layers set and makes serving easier.

Garnish with fresh parsley or additional diced bell peppers if desired.

🍽️ Serving Suggestions

This hearty casserole pairs wonderfully with:

• Garlic bread
• Dinner rolls
• Caesar salad
• Steamed green beans
• Roasted broccoli
• Mixed garden salad

For an extra comforting meal, serve alongside creamy mashed potatoes or buttered corn.

💡 Tips for the Best Ground Beef Casserole

Use Freshly Shredded Cheese

Freshly shredded cheese melts more smoothly than pre-packaged varieties and creates a creamier texture.

Don’t Overcook the Vegetables

Cook the peppers and onions just until softened. They will continue cooking while the casserole bakes.

Add More Vegetables

Mushrooms, zucchini, corn, or spinach can easily be added for extra nutrition and flavor.

Make It Spicy

Add diced jalapeños, crushed red pepper flakes, or a splash of hot sauce for a little heat.

Try Different Cheeses

Monterey Jack, Colby Jack, Pepper Jack, or a Mexican blend all work beautifully in this recipe.

🥡 Storage and Reheating

Refrigerator

Store leftover casserole in an airtight container for up to 4 days.

Freezer

Freeze individual portions or the entire casserole for up to 3 months.

Allow it to cool completely before wrapping tightly and freezing.

Reheating

Reheat in the microwave for individual portions or warm in a 350°F oven until heated through.

Cover with foil during reheating to prevent the cheese from becoming overly browned.

Variations to Try

Tex-Mex Ground Beef Casserole

Add black beans, corn, taco seasoning, and top with Pepper Jack cheese.

Italian Style

Mix in marinara sauce and Italian seasoning, then use mozzarella and Parmesan cheese.

Bacon Cheeseburger Version

Add cooked bacon pieces and top with cheddar cheese for a cheeseburger-inspired casserole.

Low-Carb Option

Skip the pasta or rice and substitute cauliflower rice for a lighter version.

⏱️ Recipe Information

• Prep Time: 15 minutes
• Cook Time: 25 minutes
• Total Time: 40 minutes
• Servings: 6–8

A Family Favorite Everyone Loves

Ground Beef Casserole is one of those classic recipes that never goes out of style. Rich, cheesy, hearty, and incredibly satisfying, it’s the perfect solution when you need an easy dinner that feeds a crowd and delivers big comfort-food flavor.

With layers of seasoned beef, tender vegetables, creamy sauce, and bubbling melted cheese, this casserole is guaranteed to become a regular part of your dinner rotation. One bite and you’ll understand why this simple homemade dish has remained a family favorite for generations.