Baked Spaghetti is a favorite casserole around here! 

In this cozy dish, spaghetti is tossed with a zesty meat sauce, topped with cheese and oven-baked until hot and bubbly.

This recipe reheats well and is freezer friendly.

baked spaghetti sliced in a casserole dish

Easy Baked Spaghetti

This easy baked spaghetti casserole is a family favorite that is loaded with flavor! 

Ingredients for Baked Spaghetti

  • Meat: Choose either ground beef or Italian sausage or a combination of the two. For a leaner option, ground turkey is a great option.
  • Aromatics: Onion, garlic & green pepper add lots of flavor to this baked spaghetti recipe.
  • Sauce: Use your favorite brand of pasta sauce or marinara sauce and add in diced tomatoes and Italian Seasoning for extra flavor
  • Spaghetti: Replace the spaghetti noodles with any long pasta or whole wheat spaghetti.
  • Cheese: The crowning glory. A mix of mozzarella and parmesan brings that gooey, golden finish we all adore.
Baked Spaghetti in baking dish with cheese on top

How to Make Baked Spaghetti

  1. Brown beef and onions. Add veggies and tomato sauce and simmer.
  2. Toss the sauce with cooked spaghetti and transfer it to a baking dish.
  3. Top with cheese and bake!

Holly’s Tips

  • Esure the spaghetti is cooked al dente as the noodles cook a bit more in the oven.
  • Add whatever you like to the sauce, replace green pepper with diced mushrooms or zucchini.  
  • You can easily adjust this to your liking and add more or less sauce if you’d prefer.
Baked Spaghetti served on a white plate

Prep Ahead

  • Since the pasta and the sauce are warm when making this dish, bake it for about 25 minutes.
  • If you prep it ahead of time and refrigerate it, it’ll take a bit longer. Remove it from the fridge 30 minutes before baking and bake for about 35 minutes or until hot in the center.
  • The prep can be done the night before and then baked before serving, making this baked spaghetti the perfect potluck dish!
  • Don’t cover the baked spaghetti so the cheese can form a nice crust. Covering it will also make it steam which can overcook the spaghetti.

Just like stuffed shells, this easy recipe is perfectly served with garlic bread and a Caesar salad.

Baking dish full of Baked Spaghetti with serving taken out of it

Easy Weeknight Casseroles

Did you make this Baked Spaghetti? Be sure to leave a rating and a comment below!

baked spaghetti sliced in a casserole dish
4.98 from 482 votes↑ Click stars to rate now!
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Baked Spaghetti

This baked spaghetti casserole is a family favorite and super easy to make!
Prep Time 25 minutes
Cook Time 30 minutes
Total Time 55 minutes
Servings 8 servings
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Ingredients  

  • 16 ounces dry spaghetti
  • ¼ cup fresh parsley
  • 1 ½ cups mozzarella cheese shredded
  • cup fresh parmesan cheese shredded

Sauce

  • 1 pound ground beef or italian sausage
  • 1 small onion diced
  • 2 cloves garlic minced
  • 1 ½ teaspoons Italian seasoning
  • ½ teaspoon salt or to taste
  • 1 green pepper diced
  • 32 ounces pasta sauce
  • 14.5 ounces diced tomatoes

Instructions 

  • Preheat the oven to 375°F.
  • In a large pot of salted water, cook the spaghetti al dente according to package directions.
  • In a large skillet over medium heat, brown the meat, onion, garlic, seasoning, and green pepper while breaking up the meat. Drain fat if needed.
  • Stir in the pasta sauce, Italian seasoning, and tomatoes to the meat. Simmer uncovered for 5 to 10 minutes or until thickened. Stir in the cooked spaghetti and parsley.
  • Transfer the mixture to a 9×13 pan, top with cheeses, and bake for 25-30 minutes or until hot and the cheese is browned and bubbly. Cut into squares to serve.

Video

Notes

If preparing ahead of time, cooking time may need to be increased by 10 minutes.
This casserole can be covered with foil and frozen (before baking). Thaw in the fridge overnight and bake as directed, adding 10 minutes to the cooking time.
Leftovers can be covered with plastic wrap and stored in the fridge for up to 4 days. Reheat in the oven or in the microwave until heated through. 
4.98 from 482 votes

Nutrition Information

Calories: 413 | Carbohydrates: 53g | Protein: 28g | Fat: 10g | Saturated Fat: 5g | Cholesterol: 55mg | Sodium: 1054mg | Potassium: 864mg | Fiber: 5g | Sugar: 9g | Vitamin A: 945IU | Vitamin C: 28mg | Calcium: 216mg | Iron: 4mg

Nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.

Course Casserole, Dinner, Entree, Pasta
Cuisine American, Italian
Oven baked spaghetti sliced in a casserole dish with text.
A serving of baked spaghetti on a plate with text
Baked spaghetti sliced in a casserole dish with text
Top image - baked spaghetti sliced in a casserole dish. Bottom image - a slice of baked spaghetti on a plate with text

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About the author

Holly is a wine and cheese lover, recipe creator, shopping enthusiast and self appointed foodie. Her greatest passion is creating in the kitchen and making deliciously comforting recipes for the everyday home cook!
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Comments

  1. I found this recipe a few years ago. It’s easy and delicious and this will be my 3rd time making it as we’re not superfans of most of the jar pasta sauces because of the acid. A friend told me to add just a pinch of baking soda to the sauce and IT WORKS! I make 1/2 the recipe using a sweet Italian sausage (bulk) and ricotta in a buttered casserole for the 2 of us. It’s very adaptable to whatever you need to substitute if necessary and the Grands love it as well.5 stars

  2. This sounds delicious. How long do you cook the pasta before you bake it? Do I just cook it al dented? Is the pasta mushy?

  3. Can’t wait to make this recipe! If giving to a friend who just had a baby – what would the directions be for cooking from frozen? And would you recommend still baking before dropping off?5 stars

    1. Hi Liz, I would freeze uncooked then when you’re ready to eat it, just thaw completely and bake in the oven for the same time/temp.

  4. I like the option to add anything. My anything was frozen meatballs (thawed and simmered in sauce) and frozen peas. It was yummy.5 stars

  5. This is a fine base recipe. However, it needs at least three chopped garlic cloves. Additionally, for more flavor, saute the onions and meat in butter.

  6. Hi! This recipe looks delicious! I am making tomorrow.
    How much dry spaghetti in the package do I buy to equal 16oz cooked?
    Thank you!5 stars

      1. Thank you so much! I don’t know why that confused me! I went back and read the ingredients again after your reply and was shaking my head at myself! Haha

        The dish was wonderful! I love your recipes! Thanks for sharing them with us!

  7. I doubled this recipe for a group beach trip (left out green pepper just b/c i do not care for it) – made one recipe with ground beef and the other with mild italian sausage – it was an absolute hit! Everyone snarfed it down and many had seconds….HOWEVER, I doubled everything but the pasta noodles – double noodles would have been way too much pasta IMHO.
    thank you for the recipe, it’ll be my new go to for baked spaghetti.5 stars

    1. Hi Julie, yes eggs can be used to help bind the spaghetti but we don’t find that necessary in this recipe. Enjoy!

      1. You mentioned you use the eggs to help bind the spaghetti together, but eggs are not listed in the ingredients or instructions. When am I using the egg/eggs?

      2. Sorry for the confusion Jessica, you can add eggs but we don’t find it necessary in this recipe. If you try it I would love to hear how it turns out!

  8. I plan on making this Tuesday. But doing a triple meat of beef-veal-bison. I am giving this 5 stars now because from exploring my saved Pinterest recipes i have used a lot of your recipe and flavor profiles and know this will be as great as all the others. I am going to make this the day before because spaghetti or chili always taste better the next day . Thank you for your beautiful creations.5 stars

    1. Thank you for your kind words Devon, this made my day! I can’t wait for you to try this baked spaghetti recipe!

  9. Am I able to pre cook this all and then stick it in the oven a different night? If I do that what would suggest for the baking time? Thank you!

    1. If you prep it ahead of time and refrigerate, it’ll take a bit longer. Remove it from the fridge about 30 minutes before baking and bake about 35 minutes or until hot in the centre. Enjoy Megan!

  10. Holly, this is great! I noticed someone commented it makes a lot and I agree, even though I made a half recipe but keeping the whole green pepper instead of halving it. It generously filled an 8 x 12 pan. I’m guessing the servings will be generous (it’s in the oven now). I used vegetarian ground beef substitute which doesn’t need pre-cooking and added extra garlic and some fennel that was ground slightly with mortar & pestle. I used to make my own Italian sausage before becoming vegetarian and I’m trying to get a similar flavor with the veg ground beef. I have a digestive condition called gastroparesis, and the veg meat substitutes go over with my stomach better than the fattier real thing.5 stars

  11. You have some of the best recipes! I’ve made several of them and they’ve all been easy and delicious. When I search for a type of food, your recipe is almost always the best sounding and closest to what I’m looking for. Thanks for your efforts!5 stars

  12. This is my third time making this recipe. Always delicious!! I added pepperoni slices for a little zing!5 stars

  13. This was amazing!! I made it as directed. I used 93%lean ground beef. I also added a can of mushrooms as I do in my regular spaghetti. It was so good!!!i cannot wait to make this again!!5 stars

  14. It’s nice to have a little change now and then and this was worth trying for sure! I will definitely make this again when our kids come over.5 stars

  15. I left out the garlic, onion and green pepper (dietary issues) and substituted 1 small bunch green onions. Also, I used oregano, marjoram, thyme and sprinkling of cinnamon for the “Italian Seasoning”. Lastly, I used mozzarella and for a kick used a blend of parmesan, romano & asiago.

    It turned out fabulously! I used some angel hair pasta however, I need to use gluten-free next time, again due to dietary issues.

    Thank you for sharing this recipe!5 stars

    1. You may want to try crushing the tomatoes, the chunks remain in tact in the end. Good luck ;)