Some recipes become family favorites not because they are fancy, but because they are easy, affordable, comforting, and reliably delicious. This 5-ingredient unstuffed pepper casserole is exactly that kind of recipe.
My aunt clipped this recipe from a magazine in 1970 and never stopped making it. Decades later, it is still the first dish requested at family reunions. One bite explains why: savory ground beef, tender green bell peppers, juicy diced tomatoes, fluffy rice, and melted mozzarella cheese come together in one hearty, bubbling casserole.
It has all the cozy flavor of classic stuffed peppers without the work of stuffing individual peppers. Everything is cooked together, topped with cheese, and baked until hot and golden. It is the sort of old-fashioned ground beef casserole that feels right at a family supper, church potluck, or busy weeknight dinner.
Why You’ll Love This 5-Ingredient Casserole
– Only 5 main ingredients make it simple and budget-friendly.
– It delivers the familiar flavors of classic stuffed peppers without stuffing or fussing.
– Everything bakes together in one casserole dish for easy cleanup.
– Ground beef and rice make it hearty enough for a satisfying family meal.
– Melted mozzarella creates a creamy, bubbly, golden topping everyone wants a scoop of.
– It is easy to stretch when you’re feeding a crowd.
Ingredients
Ground Beef
Ground beef provides the savory, hearty foundation of the casserole. Browning it before baking develops deeper flavor and gives the finished dish plenty of satisfying substance.
Green Bell Peppers
Green bell peppers bring the unmistakable flavor of traditional stuffed peppers. Chopping them into small pieces allows them to soften throughout the casserole while adding freshness, color, and a gentle vegetal sweetness.
Diced Tomatoes
A can of diced tomatoes with their juices adds moisture and rich tomato flavor. The juices are especially important because they help bring the ingredients together as the casserole bakes.
Instant White Rice
Instant white rice makes this casserole especially convenient. It absorbs the flavorful tomato juices while cooking, giving the dish a tender, filling texture without requiring a separate pot of rice.
Shredded Mozzarella Cheese
Mozzarella cheese melts beautifully across the top, creating the gooey, bubbly finish that makes a baked casserole irresistible. For a sharper, more old-fashioned casserole flavor, you can combine it with cheddar.
How to Make Unstuffed Pepper Casserole
1. Prepare the Oven and Baking Dish
Preheat your oven to 350°F. Lightly grease a 9×13-inch glass casserole dish so the finished casserole is easier to scoop and serve.
2. Brown the Beef and Peppers
Place a large skillet over medium heat. Add the ground beef and chopped green bell peppers.
Cook until the beef is completely browned and the peppers have started to soften. Drain away any excess grease before continuing.
3. Add the Tomatoes and Rice
Stir in the undrained diced tomatoes and their juices, followed by the instant white rice.
Mix thoroughly so the rice is evenly distributed and coated with the flavorful tomato mixture.
4. Assemble the Casserole
Transfer the beef, pepper, tomato, and rice mixture to the prepared casserole dish.
Spread everything into an even layer, then sprinkle the shredded mozzarella cheese evenly over the top.
5. Bake Until Hot and Bubbly
Place the casserole in the preheated oven and bake for approximately 25 to 30 minutes, or until it is hot throughout and the cheese is melted and lightly browned.
Remove it from the oven and allow it to rest for 5 minutes before serving. This short resting period helps the casserole settle and makes it easier to scoop neatly.
Pro Tips for the Best Unstuffed Pepper Casserole
Don’t drain the tomatoes. The liquid is important for helping the instant rice cook and keeping the casserole moist.
Cut the peppers fairly small. Smaller pieces soften more evenly and make every scoop taste like a bite of classic stuffed pepper.
Drain excess beef grease. This keeps the casserole hearty without making the finished dish unnecessarily greasy.
Spread the cheese evenly. A consistent layer gives you that irresistible melted-cheese topping in every serving.
Let it rest before serving. Those five minutes make a difference in texture and help the casserole hold together when scooped.
Watch the baking time. Once the cheese is melted and the casserole is thoroughly hot, there is no need to keep baking it. Overbaking can make the rice and edges drier.
Easy Variations
Make It Go Further
For a larger crowd, add another chopped bell pepper along with a little additional rice and tomatoes. It is an easy way to stretch the casserole while keeping its familiar character.
Try Cheddar
Replace some of the mozzarella with shredded cheddar cheese for a richer, sharper topping. A mozzarella-cheddar combination gives you both excellent melting and extra flavor.
Add More Vegetables
For a heartier variation, you can add finely chopped onion or another favorite casserole vegetable. Keep additions moderate so the original balance of beef, rice, tomatoes, and peppers remains intact.
Make It Ahead
Brown the ground beef and bell peppers earlier in the day. When you’re ready to cook, combine them with the remaining ingredients, assemble the casserole, and bake.
What to Serve With Unstuffed Pepper Casserole
This hearty casserole pairs beautifully with simple sides. Serve it with buttered green beans, a crisp lettuce salad, or warm homemade dinner rolls.
For a nostalgic family-supper spread, add sweet corn or applesauce on the side. A cold glass of iced tea, lemonade, or milk completes the old-fashioned comfort-food feeling.
If you’re serving it at a potluck or family reunion, keep the sides simple—the casserole is filling enough to be the star of the table.
Why This Recipe Has Stayed a Family Favorite
There is something special about recipes that survive for generations simply because people keep asking for them.
This old-fashioned unstuffed pepper casserole has everything a dependable family recipe should have: inexpensive ingredients, straightforward preparation, plenty of flavor, and a generous portion that can feed a crowd. It captures the comforting taste of stuffed peppers while eliminating the extra work of preparing individual peppers.
That combination of convenience and nostalgia is what makes recipes like this so memorable. It is the kind of dish that can begin with a magazine clipping from 1970 and end up being requested again and again at family reunions decades later.
Final Thoughts
If you love easy ground beef casseroles, classic stuffed peppers, cheesy baked dinners, and old-fashioned comfort food, this 5-ingredient unstuffed pepper casserole deserves a place in your recipe collection.
With ground beef, green peppers, tomatoes, instant rice, and plenty of melted mozzarella, you get a warm, hearty meal without a complicated ingredient list or a sink full of dishes. It is simple, thrifty, family-friendly, and deeply comforting—exactly the qualities that turn an ordinary casserole into a recipe worth passing down.