Add Preferred SourceSome nights call for a dinner that’s bubbling with cheese and loaded with hearty, comforting flavors, and Cheesy Meatball Casserole is exactly that kind of meal. It’s the perfect combination of tender pasta, saucy meatballs, and gooey cheese, all baked together into one glorious dish. It’s easy enough for a weeknight but still feels like a meal you’d serve when company’s coming.
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I’ve been making versions of this casserole for years, and it never lasts long on the table. The mix of tender pasta, savory meatballs, and melted mozzarella makes it irresistible, and the fact that it’s made with store-bought meatballs means it comes together without much fuss. It’s a big, cheesy hug in a baking dish.
This one is a great go-to for potlucks, family dinners, or when you need something that reheats beautifully for leftovers. And trust me, you’re going to want those leftovers.
History
Meatball Casserole gained popularity in American home cooking during the 1950s and 1960s, when casseroles were a go-to solution for hearty, budget-friendly family meals. While meatballs have European origins dating back centuries, the casserole-style preparation, combining them with pasta, sauce, and cheese in a baked dish, reflects mid-20th-century American convenience cooking trends. This version gained traction as busy households embraced recipes that could be assembled ahead of time, baked in one dish, and served straight from the oven, making it a comforting staple at weeknight dinners and potlucks.
Ingredients
- Penne pasta – Cooked 2 minutes less than package directions for al dente, drained and cooled under cold water
- Frozen fully cooked meatballs – About 26–28 meatballs. Let them thaw first or warm them in the microwave so your casserole cooks in a reasonable time.
- Marinara sauce – You can use your favorite sauce or go all food nerd and use homemade.
- Olive oil – Or any neutral cooking oil.
- Bell pepper – Diced. It can be any color bell pepper so use what you have on hand.
- Yellow onion – Diced. You can use red or white, or sweet onion. It all works.
- Mozzarella cheese – You can use pre-shredded pizza or Italian blend cheese, but I almost always shred my own. It shreds so quickly with a rotary grater.
- Parmesan cheese – You don’t need to use the good stuff. Any parm will work.
- Optional: Fresh basil for garnish
How To Make Mom’s Meatball Casserole
Scroll down for the full recipe card with exact measurements and printable instructions.
Start by preheating your oven to 375°F. Grab a 9×13-inch baking dish and give it a light coating of oil or cooking spray so nothing sticks later. Cook the pasta in a large pot of salted, boiling water according to the package directions for al dente pasta. Then, drain and rinse the pasta under cold running water until it is chilled. Set aside.
Set a large skillet over medium heat and add the olive oil. Toss in the diced onion and bell pepper, stirring for about 4–5 minutes until they’re softened and smelling amazing. A wooden spoon works well here for stirring without breaking the veggies apart.
In a big mixing bowl, combine the thawed meatballs, your sautéed veggies, and the jar of marinara sauce. Stir until every meatball is nicely coated. A silicone spatula makes it easy to scrape down the sides of the bowl so nothing gets left behind.
Pour the mixture into your prepared baking dish and spread it evenly with an offset icing spatula; it’s not just for cakes, it’s perfect for smoothing out casserole layers.
Sprinkle the mozzarella cheese evenly over the top, then add the parmesan for that golden crust. For quick, even coverage, I like to use a rotary cheese grater right over the dish, no pre-shredding required.
Cover the casserole tightly with heavy-duty aluminum foil (prevents sticking and traps heat better). Bake for 25 minutes, then carefully remove the foil using heat-resistant silicone oven mitts so you don’t steam-burn your hands. Bake for another 10 minutes until the cheese is bubbling and lightly browned.
Let it rest for about 5 minutes so the sauce can settle. Garnish with basil if you’re feeling fancy, then dig in while it’s hot and cheesy.
Chef Jenn’s Tips
- Use a pasta shape with ridges (like penne or rigatoni) so the sauce clings to every bite.
- If you like extra saucy casseroles, add half a jar more marinara before baking.
- For a little kick, toss in crushed red pepper flakes when you sauté the veggies.
Serving Suggestions
This casserole pairs perfectly with a crusty garlic bread and a Caesar salad. For dessert, go with something light and fruity like a Blueberry Shortcake to balance out the richness.
Storage
- Warm in a 350°F oven until hot, or microwave individual portions in 1-minute bursts.
- Store leftovers in an airtight container for up to 4 days.
- Wrap the entire casserole tightly in foil, then freeze for up to 3 months. Thaw overnight in the fridge before reheating.
Mom’s Meatball Casserole
Ingredients
- 12 ounces penne pasta
- 24 ounces bag frozen fully cooked meatballs about 26–28 meatballs
- 24 ounces jar marinara sauce
- 1 green bell pepper diced
- 1 small yellow onion diced
- 2 cups mozzarella cheese shredded
- ½ cup parmesan cheese grated
- 1 tablespoon olive oil
- basil optional for garnish
Instructions
- Preheat oven to 375°F. Lightly grease a 9×13-inch baking dish.
- Cook the pasta in a large pot of boiling salted water according to package directions for al dente pasta. Drain and rinse under cold water to stop the cooking.
- Heat the olive oil in a skillet over medium heat. Sauté onion and bell pepper for 4–5 minutes until softened.
- Combine the pasta, thawed meatballs, sautéed vegetables, and marinara sauce in a large bowl. Stir to coat evenly.
- Spread the mixture in the prepared baking dish. Top with mozzarella, then Parmesan.
- Cover with foil and bake for 25 minutes. Remove foil and bake 10 more minutes until cheese is melted and golden.
- Let rest for 5 minutes before serving. Garnish with basil if desired.
Notes
Chef Jenn’s Tips
- Use a pasta shape with ridges (like penne or rigatoni) so the sauce clings to every bite.
- If you like extra saucy casseroles, add half a jar more marinara before baking.
- For a little kick, toss in crushed red pepper flakes when you sauté the veggies.
Nutrition
A Note on Nutritional Information
Nutritional information for this recipe is provided as a courtesy and is calculated based on available online ingredient information. It is only an approximate value. The accuracy of the nutritional information for any recipe on this site cannot be guaranteed.
