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close-up of baked spaghetti in a casserole dish being lifted out with a spatula

Easy Baked Spaghetti

This baked spaghetti recipe is made with ground beef, marinara sauce, and other simple ingredients. It's comforting and has the tastiest top cheese layer baked to golden perfection!
Course Main Course
Cuisine American
Keyword baked spaghetti recipe, cheesy baked spaghetti, spaghetti bake
Prep Time 10 minutes
Cook Time 35 minutes
Total Time 45 minutes
Servings 8
Calories 476kcal


  • 1 pound uncooked spaghetti
  • 1 pound lean ground beef
  • 1/2 medium onion chopped
  • 1/2 teaspoon dried oregano or Italian seasoning
  • 1/2 teaspoon red pepper flakes optional
  • 4 cloves garlic minced
  • 4 cups marinara sauce
  • 1 cup shredded mozzarella
  • 1 cup shredded cheddar
  • 1 cup freshly grated parmesan cheese
  • Salt & pepper to taste


  • Preheat oven to 375F and move the rack to the top third of the oven.
  • Boil a salted pot of water for the pasta. Cook it for 2 minutes less than the package directions indicate. Once it's done, drain it and add it to a 9x13 casserole/baking dish.
  • Meanwhile, add the beef, onion, oregano, and red pepper flakes to a skillet. There should be enough fat released by the beef to cook the onion, but if it's particularly lean, add a tablespoon of olive oil. Cook over medium-high heat, stirring occasionally, until the meat has browned/cooked through (about 10 minutes). If there's a lot of excess fat, spoon most of it out.
  • To the skillet, stir in the garlic and cook for about a minute, then add in the marinara sauce and cook for a few more minutes until it's warmed through. I stir in some salt & pepper as well.
  • Pour the beef mixture over top of the spaghetti. Toss until everything is coated. Smooth it out into an even layer.
  • Top with the cheeses and bake, uncovered, for 20 minutes. Broil for a few minutes to brown the cheese if you want (watch it carefully). Let it sit for 5-10 minutes, then serve by cutting it into squares using a spatula. I garnished it with some chopped parsley, but that's totally optional.


  • Serves 6-8 depending on how much people eat.
  • For a shortcut, I used 2 cups of a bagged blend of shredded mozzarella and cheddar. Feel free to grate your own cheeses, though! Generally, grating your own cheeses does yield tastier results. 
  • 4 cups marinara sauce = 32 ounces, so you'll use one 24 oz. jar + a bit of a second jar.
  • 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: 476kcal | Carbohydrates: 51g | Protein: 33g | Fat: 15g | Saturated Fat: 8g | Trans Fat: 1g | Cholesterol: 72mg | Sodium: 1052mg | Potassium: 788mg | Fiber: 4g | Sugar: 7g | Vitamin A: 914IU | Vitamin C: 10mg | Calcium: 351mg | Iron: 4mg