Leftover Spaghetti Bake
Leftover Spaghetti Bake is a quick and easy way to transform your leftover spaghetti into a completely different meal!
You’re going to want to add this leftover spaghetti casserole recipe to your meal plan because your entire family is going to love it!
I really love making pasta because it’s quick, easy, and inexpensive. It also gets boring pretty quickly, which is why I’m always trying new things like chicken spaghetti and Greek spaghetti. Today’s recipe uses spaghetti leftovers with pasta sauce and lots of melted cheese – it’s so good!
This delicious leftover spaghetti bake is a fun new way to enjoy a second night of spaghetti! If you want to do something a little different from just tossing it in the microwave for a second meal, you’ll love how easy it is to throw everything together to make an entirely new meal the whole family will enjoy!
Ingredients
This is meant to be a brief overview of this great recipe. For step-by-step instructions and a full printable recipe card with ingredients, please scroll down to the teal box below.
Here’s what you’ll need to make this leftover spaghetti casserole:
- leftover spaghetti with sauce
- eggs
- milk
- grated parmesan cheese
- shredded sharp cheddar cheese or mozzarella cheese
Variations
- Add 1-2 teaspoons of Italian seasoning or spaghetti seasoning to the spaghetti mixture before baking.
- For extra creamy baked spaghetti, add 1/2 cup of cottage cheese, cream cheese, or ricotta cheese to the milk and egg mixture before adding the leftover spaghetti.
- Add cooked ground beef, Italian sausage, or leftover shredded marinara chicken.
- Other cheeses that would work in this recipe are shredded gouda, gruyère, and fontina.
- Add some veggies to the pasta and spaghetti sauce mixture. One finely diced bell pepper or 1 cup of chopped baby spinach are great additions.
Out of something you need? Check out our free ingredient substitutions printable!
Ang’s Recipe Tips
- If the leftover spaghetti noodles seem a little dry, add more marinara sauce.
- Use leftover spaghetti that has been refrigerated for up to 2-3 days for the best results.
Storage
To Store: Leftover Spaghetti Bake should be stored in the fridge in an airtight container. (These are my favorite airtight containers.)
To Reheat: Microwave individual portions in 30-second intervals until heated throughout.
To Freeze: Cover the casserole with plastic wrap or aluminum foil and then slide the whole casserole into a 2-gallon freezer bag. Be sure to label.
To Thaw: Allow the casserole to thaw overnight in the fridge.
Related: Ravioli Lasagna
Serving Suggestions
A green side salad is the perfect way to add some veggies to this hearty meal. When I have the time, I also serve garlic bread or Italian breadsticks.
You can also take it up a notch by serving it with meat sauce or this cheesy meatball casserole. (I love that this casserole can be made with homemade ground beef and pork meatballs, homemade chicken meatballs, or store-bought meatballs.)
Use leftover or frozen meatballs to make a batch of meatball cupcakes as a side dish.
Not ready to make this easy baked spaghetti recipe yet?
When you do make it, please come back and comment and leave me a 5-star rating below! ⭐⭐⭐⭐⭐
Leftover Spaghetti Bake
As an Amazon Associate, I earn from qualifying purchases.
Ingredients
- 8 cups leftover spaghetti with sauce
- 4 eggs
- ¼ cup milk
- ½ cup grated Parmesan cheese
- 2 cups shredded sharp cheddar cheese OR mozzarella cheese divided
Instructions
- Preheat the oven to 350 degrees.
- Spray a 9×13 casserole dish with nonstick cooking spray.
- In a large mixing bowl, whisk together the eggs and milk until completely mixed.¼ cup milk, 4 eggs
- Stir in the grated Parmesan cheese.½ cup grated Parmesan cheese
- Add the spaghetti to the bowl and toss the egg mixture until well combined.8 cups leftover spaghetti with sauce
- Add 1 cup of the cheddar cheese and toss until mixed.2 cups shredded sharp cheddar cheese OR mozzarella cheese
- Transfer the spaghetti to the prepared baking dish.
- Bake, covered, for 30 to 40 minutes or until the casserole is cooked through.
- Remove the cover and top the casserole with the remaining cheese.
- Return to the oven and bake for an additional 5 to 10 minutes or until the cheese has melted.
Nutrition
Meal Planning
Want to add this leftover spaghetti bake recipe to your meal plan? Download our free printable meal plan here.
This recipe is included in Meal Plan 23 along with:
- wild rice salad
- spicy grilled chicken
- pineapple banana bread
- butter burgers
- chocolate zucchini cake
- potato sausage casserole
… and more!
Similar Recipes
If you love this leftover baked spaghetti, you’ll want to try one of these delicious recipes next time:
- monterey spaghetti
- chicken broccoli pasta bake
- American goulash
- eggplant parmesan bake
- cheesy pasta bake
- penne with sausage and broccolini
- Italian sausage pasta
- chicken Caesar pasta
- angel chicken and pasta
- homemade spinach pasta
I love homemade meat sauce so I’m going to make this with my leftovers next time.
I made this using marinara sauce and it was really good. Next time I want to try your meatball casserole with it. Thanks for the recipes!
I have to say that I could never get it looking to good on the plate like the image, you have great knife skills lol. I made it and served it with garlic bread (can never have too many carbs!) Everyone loved it.
I love my carbs, too, Linsie! Try this with garic bread – so good!
I think I’m going to try to make this with alfredo sauce instead of tomato sauce.
I would love to know how that turns out Shilo!
thank you thank you thank you for this recipe!! OMG It’s super easy…and it’s sooooo good! a new favorite in our home! I completely recommend this to ANYONE! It’s amazing! 😋
Thank you so very much for the kind words and 5 star review, Barb! I’m so glad you enjoyed the spaghetti recipe – I love a good recipe for remaking leftovers!
I haven’t made this yet… but I LOVE how you add the amount of ingredients under the directions!! Brilliant! Why doesn’t everyone do this?! It’s so thoughtful and a huge time saver! Thank you!
Thank you for your sweet comment! I find it quite helpful myself 🙂
Really great way to use leftover spaghetti. I made your meatball casserole to go with it. Thanks for the yummy recipes!
Delicious Goodness. First attempt and Oh My Yum! Cheesy Easy Peasy
Thank You TY
what if I don’t have grated parmesan cheese? What can I use instead?
Parmesan cheese can be substituted with asiago cheese or even Mexican cotija cheese. If you don’t have any of these you can use toasted breadcrumbs to add a little texture. For a vegan alternative, try nutritional yeast with ground walnuts or almonds.