The aroma of savory pizza wafted through my kitchen, instantly transporting me back to cozy family dinners. But this time, I wasn’t just whipping up any ordinary pizza; I was crafting an Easy Spaghetti Squash Pizza Casserole. This delightful dish not only satisfies those pizza cravings, but also sneaks in wholesome nutrients, making it a perfect weeknight meal for everyone—even the picky eaters! With its simple prep and comforting layers of gooey cheese, this casserole is a brilliant low-carb alternative that pleases both kids and adults. Whether you’re looking to elevate your dinner game or find a quick fix for busy evenings, this recipe checks all the boxes. Are you ready to discover a new family favorite?

Why is Spaghetti Squash Pizza Casserole a must-try?
Satisfying, this casserole captures the beloved flavors of pizza while keeping it guilt-free!
Kid-Friendly, it’s perfect for even the pickiest eaters, making family dinners a breeze.
Quick & Easy, prepare this dish in no time, perfect for those busy weeknights.
Versatile, customize it with your favorite toppings and sauces for endless flavor combinations.
Nutritious, with its low-carb and gluten-free profile, you can enjoy comfort food without the calories!
This remarkable dish is sure to crown your table, just like our delicious Jiffy Corn Casserole when you’re looking for something similarly delightful!
Spaghetti Squash Pizza Casserole Ingredients
• Dive into the deliciousness with these essential components!
For the Casserole
- Spaghetti Squash – A nutritious base that serves as a low-carb, grain-free alternative to pasta.
- Pizza Sauce – Adds moisture and flavor; choose low-sugar marinara for a keto-friendly option.
- Mozzarella Cheese – Melts beautifully for that gooey texture; substitute with dairy-free cheese for a vegan twist.
Optional Toppings
- Pre-cooked Meats (e.g., pepperoni, sausage) – Enhances protein content for a heartier meal.
- Vegetables (e.g., bell peppers, spinach, mushrooms) – Boosts nutrition and adds delightful crunch.
- Extra Cheeses (e.g., parmesan, goat cheese) – Elevates flavor and makes it feel more indulgent.
Get ready to create a delightful Spaghetti Squash Pizza Casserole that the whole family will enjoy!
Step‑by‑Step Instructions for Spaghetti Squash Pizza Casserole
Step 1: Preheat the Oven
Begin by preheating your oven to 350°F (175°C). This step ensures that the Spaghetti Squash Pizza Casserole bakes evenly and thoroughly. While the oven is heating up, gather your ingredients and prepare your baking dish by lightly greasing it with cooking spray or olive oil.
Step 2: Cook the Spaghetti Squash
Prepare your spaghetti squash using your preferred method. If roasting, halve the squash lengthwise, remove the seeds, place it cut-side down on a baking sheet, and roast for 45-50 minutes until tender. If using an Instant Pot, cut the squash in half, remove seeds, add 1 cup of water, seal it, and cook on high pressure for 7 minutes, then quick release. The squash should be fork-tender and easily shredded into strands.
Step 3: Mix the Base Ingredients
Once the spaghetti squash is cooked and slightly cooled, carefully scrape the flesh with a fork to create spaghetti-like strands. In a 9×9-inch baking dish, combine the cooked squash with your choice of pizza sauce, stirring well to ensure that the squash is evenly coated. You may also add any optional toppings like pre-cooked meats or chopped vegetables at this step for extra flavor.
Step 4: Add the Cheese and Toppings
Top the casserole mixture generously with shredded mozzarella cheese, ensuring it covers the entire surface to achieve that gooey, melty goodness. If desired, sprinkle additional toppings such as cooked pepperoni, bell peppers, or extra cheeses over the cheese layer. This will enhance both the flavor and the nutrition of your Spaghetti Squash Pizza Casserole.
Step 5: Bake the Casserole
Transfer the assembled casserole to the preheated oven and bake for about 30 minutes. You’ll know it’s done when the cheese is bubbly and slightly golden. For an extra crispy top, switch the oven to broil for an additional 3-5 minutes, keeping a close eye to prevent burning. When finished, the casserole should have a deliciously inviting aroma, showcasing its cheesy goodness.
Step 6: Serve and Enjoy
Remove the casserole from the oven and allow it to cool for a few minutes before serving. This makes it easier to cut and enjoy without losing its shape. Serve warm, garnished with fresh herbs like basil or parsley to add a touch of color and flavor. This Spaghetti Squash Pizza Casserole is perfect for family dinners, offering a satisfying meal that everyone will love!

Expert Tips for Spaghetti Squash Pizza Casserole
-
Cook Thoroughly: Ensure the spaghetti squash is well-cooked for a pleasant texture. Undercooking can lead to crunchy strands that don’t mimic pasta.
-
Quick Method: For a swift preparation, use the Instant Pot. It yields perfectly tender squash in just 7 minutes, making your Spaghetti Squash Pizza Casserole a breeze!
-
Watch the Broil: Keep a close eye while broiling to avoid burning. It only takes a minute for cheese to go from bubbly to charred.
-
Customize Flavors: Feel free to experiment with different toppings! Adding roasted vegetables or herbs can enhance the nutritional value and taste of your casserole.
-
Storage Tips: Store leftovers in an airtight container for up to 3 days. Reheat gently to keep the cheese melty and delicious.
What to Serve with Spaghetti Squash Pizza Casserole
Looking to create a complete dining experience? Pairing your main dish with complementary sides will elevate your meal to new heights.
- Garlic Bread: A warm, toasty side that perfectly complements the cheesy casserole, offering a satisfying crunch to balance the softness.
- Caesar Salad: Crisp romaine drizzled with creamy dressing adds a refreshing contrast, making every bite delightful and light.
- Roasted Vegetables: Mixed seasonal veggies, caramelized to perfection in the oven, enhance nutrition and bring a vibrant splash of color to your plate.
- Zucchini Noodles: A light, low-carb alternative that keeps the meal wholesome while mimicking a pasta-like texture, perfect for the health-conscious.
- Fruit Salad: A sweet and juicy medley provides a refreshing finish to the meal, balancing the savory richness of the casserole beautifully.
- Sparkling Water with Lemon: This refreshing drink cuts through the richness of the casserole and offers a zesty twist that is both refreshing and healthful.
- Chocolate Avocado Mousse: For dessert, this creamy, indulgent treat rounds off the meal on a sweet note, while still being nutritious!
With these delightful pairings, your Spaghetti Squash Pizza Casserole will shine as the star of a well-rounded, unforgettable feast.
Spaghetti Squash Pizza Casserole Variations
Feel free to unleash your creativity and customize this delightful casserole to suit your taste buds!
-
Dairy-Free: Substitute mozzarella with your favorite dairy-free cheese for a creamy, vegan-friendly option.
For a comforting twist, try adding nutritional yeast for a cheesy flavor that won’t disappoint! -
Protein-Packed: Add cooked ground turkey or chicken for a heartier dish, keeping everyone satisfied.
Incorporating meat can also elevate flavor and boost nutrition, making it a complete meal in one dish. -
Vegetable Boost: Toss in sautéed zucchini or diced onions for extra veggies that brighten the dish.
Not only does this enhance texture, but additional colors will make your casserole visually appealing! -
Spice it Up: Add red pepper flakes or diced jalapeños to the mixture for a spicy kick.
This variation is perfect for those who crave a little heat with every cheesy bite! -
Herb Infusion: Mix in fresh basil or oregano into the casserole for a burst of aromatic flavor.
This will evoke that authentic pizza feel and make your home smell delightful while it bakes! -
Alternate Sauces: Experiment with different sauces, such as pesto or barbecue sauce, to change the flavor profile.
Using unique base sauces can transport this dish to the next level and keep dinner exciting! -
Quinoa Layer: Mix in cooked quinoa for added texture and a nutritious boost.
This little addition packs protein, making your casserole even more filling and satisfying!
If you’re searching for other comfort food options, consider pairing your casserole with a scrumptious Shepherds Pie Casserole or a delightful Green Bean Casserole! The versatility in flavors and nutrition will surely impress at your dinner table!
Make Ahead Options
These Spaghetti Squash Pizza Casserole is a meal prep dream come true! You can easily prepare the casserole up to 24 hours in advance by mixing the cooked spaghetti squash with pizza sauce and any optional toppings, then storing it covered in the refrigerator. To maintain its quality, store the cheese separately in an airtight container, as this prevents it from becoming gummy. When you’re ready to bake, simply top the casserole with cheese and pop it into a preheated oven at 350°F (175°C) for 30 minutes. This way, you’ll enjoy a delicious, hassle-free dinner that’s just as flavorful and comforting as when you made it fresh!
Storage Tips for Spaghetti Squash Pizza Casserole
Fridge: Store leftover Spaghetti Squash Pizza Casserole in an airtight container for up to 3 days. Let it cool down completely before sealing to maintain optimal freshness.
Freezer: If you want to keep it longer, freeze the casserole for up to 2 months. Wrap individual portions tightly in plastic wrap and then place in a freezer-safe bag.
Reheating: When ready to enjoy, thaw overnight in the fridge and reheat in the oven at 350°F (175°C) for about 20 minutes, or until heated through. You can also microwave individual portions for a quicker option.
Make-Ahead: Feel free to prepare the casserole ahead of time, assembling it fully (but not baking), and refrigerate for up to 24 hours before baking. This can save you valuable time on busy evenings!

Spaghetti Squash Pizza Casserole Recipe FAQs
What type of spaghetti squash should I choose?
Look for a spaghetti squash that feels heavy for its size and has a smooth, hard exterior. Avoid any that have dark spots or soft areas, as these may indicate overripeness. A perfect squash should be golden-yellow in color.
How should I store leftover Spaghetti Squash Pizza Casserole?
Store leftovers in an airtight container in the fridge for up to 3 days. Let it cool completely before sealing to keep it fresh. If you’re storing for longer, consider freezing it.
Can I freeze Spaghetti Squash Pizza Casserole?
Absolutely! To freeze, wrap individual portions tightly in plastic wrap and place them in a freezer-safe bag. It keeps well for up to 2 months. When ready to eat, thaw overnight in the fridge and reheat in the oven at 350°F (175°C) for about 20 minutes until warmed through.
Why is my spaghetti squash too watery?
If your spaghetti squash is watery, it may not have been cooked long enough, or it could have too much moisture from the sauce. When preparing, ensure it’s fully cooked and drained of excess liquid if necessary to achieve a better texture.
Is this casserole suitable for kids with allergies?
It can be easily modified to suit various dietary needs! The recipe is egg-free, gluten-free, and nut-free, but always double-check your specific ingredients for allergens. If preparing for a child with dairy allergies, simply substitute regular mozzarella with dairy-free cheese.
What are some easy ways to customize this recipe?
The possibilities are endless! You can add more vegetables, such as zucchini or olives, or switch out the mozzarella for different cheeses like cheddar or feta. For added protein, mix in cooked ground turkey or sausage, or use different pizza sauce—like pesto—to explore new flavors!

Spaghetti Squash Pizza Casserole - A Healthy Family Favorite
Ingredients
Equipment
Method
- Preheat your oven to 350°F (175°C). Lightly grease your baking dish.
- Cook the spaghetti squash until tender using your preferred method (roasting or Instant Pot).
- Scrape the cooked squash with a fork, combine with pizza sauce in the baking dish, and add optional toppings.
- Top with shredded mozzarella cheese and sprinkle any desired additional toppings.
- Bake the casserole for about 30 minutes until cheese is bubbly and golden. Broil for an extra crispy top if desired.
- Let the casserole cool for a few minutes before serving, then enjoy!

Leave a Reply