Cheesy ground beef and green pepper casserole is a warm, satisfying dinner made with seasoned beef, tender bell peppers, onions, and a rich layer of melted cheese. It has the familiar comfort-food flavor of a stuffed pepper meal, but it is much easier to prepare because everything cooks together in one baking dish.
This easy ground beef casserole is ideal for weeknight dinners, meal prep, casual family gatherings, or whenever you need a hearty dinner with simple ingredients. The savory beef, lightly sweet green peppers, and golden cheese topping create a filling meal that pairs well with salad, rice, roasted potatoes, or warm bread.
Why You’ll Love This Recipe
This casserole is easy to make and uses basic ingredients that are common in many kitchens. Ground beef cooks quickly, bell peppers add freshness, and cheese creates a rich topping that brings everything together. It is a good recipe for feeding a family without spending hours cooking.
The dish is also flexible. You can add rice, pasta, potatoes, mushrooms, beans, or extra vegetables depending on what you have available. It can be mild and family-friendly or made spicier with chili flakes, jalapeños, or pepper Jack cheese.
Recipe Information
Preparation time for this cheesy beef and pepper casserole is about 20 minutes. Cooking and baking time is approximately 25 minutes. The total time is around 45 minutes. This recipe serves six people as a main dish. The difficulty level is easy.
Main Ingredients Explained
Ground beef gives the casserole a rich and hearty base. An 80/20 or 85/15 blend provides great flavor and stays tender after baking. If you prefer a lighter option, ground turkey can be substituted, but it should be seasoned well because it has less natural fat.
Green bell peppers are the signature vegetable in this recipe. They have a mild savory flavor that works perfectly with beef and cheese. Red, yellow, or orange bell peppers can be added for a sweeter flavor and more color.
Mozzarella cheese adds a creamy melted layer, while cheddar gives the casserole a sharper, more savory taste. Using both cheeses together creates the best combination of flavor and texture. Onion and garlic help build a flavorful homemade base without requiring a complicated sauce.
Simple Recipe Overview
Start by browning ground beef with onions, garlic, and chopped bell peppers. Add tomato sauce, seasonings, and a little Worcestershire sauce to create a thick, savory beef mixture. Transfer it to a casserole dish, add cheese, and bake until bubbly and golden.
The result is a simple baked ground beef dinner with tender peppers and a creamy cheese topping. It can be served as it is for a lower-carb meal, or paired with rice, potatoes, pasta, or bread for a more filling plate.
Ingredients
For this cheesy ground beef and green pepper casserole, you will need 1½ pounds ground beef, 2 large green bell peppers chopped into bite-sized pieces, 1 small yellow onion diced, 3 cloves garlic minced, 1 cup tomato sauce, 2 tablespoons tomato paste, 1 tablespoon Worcestershire sauce, 1 teaspoon garlic powder, 1 teaspoon onion powder, 1 teaspoon Italian seasoning, ½ teaspoon smoked paprika, ¾ teaspoon salt, ½ teaspoon black pepper, 1½ cups shredded mozzarella cheese, 1 cup shredded cheddar cheese, and 1 tablespoon olive oil if needed for cooking the vegetables.
How to Choose the Best Ingredients
Choose ground beef that is fresh, cold, and bright red in color. Ground beef with a small amount of fat provides the best flavor for casseroles because it stays tender while baking. If there is a lot of grease after cooking, simply drain most of it before adding the sauce.
Choose bell peppers that feel firm, smooth, and heavy for their size. Avoid peppers with wrinkled skin, soft spots, or mold around the stem. Green peppers have a classic savory flavor, while mixing in a red or yellow pepper adds sweetness and makes the dish more colorful.
Use a cheese that melts well. Freshly shredded mozzarella and cheddar usually melt more smoothly than packaged pre-shredded cheese, but either type works well. Choose a cheese blend that you enjoy because the melted cheese is an important part of the final casserole.
Preparing the Ground Beef
Place a large skillet over medium-high heat. Add the ground beef and cook for five to seven minutes, breaking it into small crumbles with a wooden spoon or spatula. Continue until there is no pink remaining.
Drain excess grease carefully if necessary. A small amount of fat adds flavor, but too much can make the casserole heavy. Make sure the ground beef reaches an internal temperature of 160°F, or 71°C, before serving.
Add the diced onion to the skillet with the cooked beef. Stir and cook for about three minutes until the onion starts to soften. Add the chopped green bell peppers and cook for another four to five minutes. The peppers should become slightly tender but still have a little texture.
Preparing the Remaining Ingredients
Add the minced garlic to the beef and pepper mixture. Stir for about 30 seconds, just until fragrant. Garlic cooks quickly, so avoid letting it turn dark brown in the skillet.
Add the tomato sauce, tomato paste, Worcestershire sauce, garlic powder, onion powder, Italian seasoning, smoked paprika, salt, and black pepper. Stir everything together until the beef and vegetables are evenly coated.
Reduce the heat to medium-low and let the mixture simmer for five minutes. The sauce should thicken enough to coat the beef without being watery. If it becomes too thick, add a small splash of water or beef broth. If it seems thin, let it simmer for a few extra minutes.
Step-by-Step Instructions
Preheat your oven to 375°F, or 190°C. Lightly grease a 9-by-13-inch baking dish with cooking spray or olive oil. This helps prevent the cheese and sauce from sticking to the sides.
Transfer the ground beef and green pepper mixture into the prepared baking dish. Spread it into an even layer so every serving contains beef, peppers, and sauce. Smooth the surface gently with the back of a spoon.
Sprinkle the mozzarella cheese evenly over the beef mixture, followed by the cheddar cheese. The mozzarella creates a creamy melted layer, while the cheddar gives the casserole a golden, flavorful finish.
Bake uncovered for 15 to 18 minutes, until the cheese is completely melted and bubbling around the edges. For a lightly browned top, turn on the broiler for one to two minutes at the end. Watch closely because cheese can brown quickly under the broiler.
Remove the casserole from the oven and let it rest for five to 10 minutes before serving. This allows the sauce to settle and makes the casserole easier to scoop.
Tips for the Best Result
Cook the bell peppers until they are just tender before baking. They will continue cooking in the oven, so you do not want them to become overly soft in the skillet. Slightly tender peppers give the casserole the best texture.
Keep the beef sauce thick. A thick sauce makes the casserole hearty and prevents extra liquid from collecting in the baking dish. Tomato paste is helpful because it adds flavor while thickening the sauce.
Use a mix of mozzarella and cheddar for the best cheese topping. Mozzarella melts smoothly and stretches nicely, while cheddar gives the dish a stronger cheesy flavor. You can also add a little Parmesan on top for extra savory flavor.
Common Mistakes to Avoid
Avoid overcooking the ground beef. Cook it until browned, then let it finish absorbing the sauce and seasonings. Ground beef that is cooked too long can become dry after baking.
Do not add too much liquid to the beef mixture. Bell peppers release some moisture as they cook, and the cheese topping should sit over a thick filling rather than a thin sauce. If the mixture looks watery, simmer it longer before placing it in the baking dish.
Avoid baking for too long after the cheese has melted. The casserole is ready when the sauce bubbles and the cheese is golden. Extra baking time can make the peppers too soft and the beef less tender.
Flavor Variations
For a stuffed pepper casserole variation, stir in two cups of cooked rice before transferring the beef mixture to the baking dish. Rice makes the dish more filling and gives it the familiar flavor and texture of classic stuffed peppers.
For a spicy version, add diced jalapeño, crushed red pepper flakes, cayenne pepper, or hot sauce to the beef mixture. Use pepper Jack cheese instead of mozzarella for a warm, spicy cheese topping.
For a mushroom and pepper casserole, add sliced mushrooms with the onions. Cook the mushrooms until they release their moisture and begin to brown before adding the sauce. This creates a rich, savory variation that is especially good with rice or mashed potatoes.
For a lower-carb version, serve the casserole with a side salad, roasted broccoli, cauliflower rice, or steamed green beans. The beef, peppers, and cheese are satisfying on their own without needing pasta or bread.
How to Serve Ground Beef and Pepper Casserole
Serve this cheesy casserole with white rice, brown rice, mashed potatoes, roasted potatoes, or buttered noodles. These sides are excellent for enjoying the savory tomato sauce and melted cheese.
A crisp garden salad, roasted carrots, steamed broccoli, corn, or green beans are lighter side dishes that balance the rich beef and cheese. Garlic bread, dinner rolls, or crusty bread are also perfect for scooping up every bit of sauce.
For a casual family dinner, place the casserole in the center of the table and let everyone serve themselves. Add sour cream, hot sauce, chopped parsley, or sliced green onions for extra toppings.
Meal Prep and Storage
This casserole is excellent for meal prep. The ground beef and pepper filling can be made up to three days in advance and stored in an airtight container in the refrigerator. When ready to bake, transfer the filling to a dish, add the cheese, and bake until hot.
Store fully baked leftovers in an airtight container in the refrigerator for up to four days. Let the casserole cool completely before storing it so excess steam does not make the cheese topping wet.
Freezing Instructions
For the best freezer option, prepare the beef and pepper filling, let it cool fully, and place it in a freezer-safe container. Freeze for up to two months. Thaw the filling overnight in the refrigerator before adding cheese and baking.
You can also freeze the fully baked casserole in individual portions. Wrap each portion well or store it in freezer-safe containers. Reheat gently after thawing for an easy meal on a busy day.
Reheating Instructions
Reheat individual portions in the microwave until hot throughout. Add a small splash of water or tomato sauce if the filling seems dry after refrigeration.
For a larger portion, place the casserole in a covered baking dish and warm it in a 350°F oven for 15 to 20 minutes. Remove the cover for the final few minutes if you want the cheese to become lightly browned again.
Frequently Asked Questions
Can I use ground turkey instead of ground beef? Yes. Ground turkey is a good substitute for a lighter casserole. Add a little olive oil while cooking if needed, and make sure the turkey reaches 165°F, or 74°C, before serving.
Can I add rice to this casserole? Yes. Cooked rice is an excellent addition and gives the recipe a classic stuffed pepper feel. Stir it into the beef mixture before transferring everything to the baking dish.
Can I use different bell peppers? Yes. Red, yellow, and orange bell peppers are all delicious. Green peppers have a more savory flavor, while the other colors are sweeter. A mix of colors makes the casserole look especially attractive.
Why is my casserole watery? This usually happens when the sauce is too thin or the peppers release extra moisture. Simmer the beef mixture before baking until it thickens, and avoid adding too much broth or water.
Can I make this recipe vegetarian? Yes. Replace the ground beef with cooked lentils, plant-based ground meat, black beans, mushrooms, or a combination of chopped vegetables. Use vegetable broth or extra tomato sauce as needed.
Final Thoughts
Cheesy ground beef and green pepper casserole is a simple homemade meal that delivers big flavor with easy ingredients. The seasoned beef, tender bell peppers, rich tomato sauce, and melted cheese create a comforting dish that works for family dinners, meal prep, and casual entertaining.
Make it with rice for a stuffed pepper-style casserole, serve it with a fresh salad for a lighter meal, or enjoy it with potatoes and bread for classic comfort food. However you serve it, this easy beef casserole is warm, filling, and sure to become a dinner favorite.