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close-up of meatball casserole being lifted up by a spatula

Easy Meatball Casserole

This meatball casserole recipe comes together quickly, uses everyday ingredients, and is comforting on a cold day!
Course Main Course
Cuisine American
Keyword meatball casserole recipe
Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Servings 6
Calories 539kcal


  • 3 cups uncooked egg noodles
  • 24 ounces meatballs (I used frozen) see note
  • 1 tablespoon olive oil
  • 1/2 medium onion chopped
  • 3 cloves garlic minced
  • 3 cups (a 24 oz. jar) marinara sauce
  • Salt & pepper to taste
  • 2 cups shredded mozzarella cheese


  • Preheat the oven to 375F and move the rack to the top third of the oven.
  • Cook the noodles for a minute or two less than the package instructions suggest, then drain them and transfer to a 9x13 casserole dish.
  • Meanwhile, add the olive oil and onion to a skillet over medium-high heat. Cook for 4-5 minutes.
  • Stir in the garlic and cook for about 30 seconds.
  • Add in the marinara sauce and meatballs and heat through. Important: if using frozen meatballs, it's important to cook them until thawed (depending on the size/type of meatballs, this may take 8-10+ minutes). Simmer over medium heat (or lower if it's bubbling too much) and stir occasionally. Break a meatball in half to ensure that it's fully thawed.
  • Pour the skillet contents into the casserole dish and add half the cheese and toss together (I also add some salt & pepper at this point), then spread it out evenly.
  • Top the casserole with the remaining cheese and bake, uncovered, for 10-15 minutes or until it's hot and bubbly. Optional: broil it for a few minutes (watch it so it doesn't burn) to brown the cheese.


  • For convenience sake, you can use pre-made frozen meatballs. Use as many/few as you like. 24 oz. of them made quite a lot of casserole, so you could even use half the amount if you're only feeding 4 people, for example. Thawed meatballs or fresh homemade meatballs (my recipe is linked) will work too (any kind of meatballs will be fine).
  • Nutritional information is provided as a courtesy only and should be construed as an estimate rather than a guarantee. Ingredients can vary and Salt & Lavender makes no guarantees to the accuracy of this information.


Calories: 539kcal | Carbohydrates: 22g | Protein: 32g | Fat: 36g | Saturated Fat: 14g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 15g | Trans Fat: 1g | Cholesterol: 127mg | Sodium: 944mg | Potassium: 825mg | Fiber: 3g | Sugar: 6g | Vitamin A: 803IU | Vitamin C: 11mg | Calcium: 232mg | Iron: 3mg