If you’re looking for a delicious and comforting dish that’s both unique and satisfying, the Creamy Spaghetti Squash Au Gratin Recipe will quickly become one of your favorites. This recipe takes the naturally mild and slightly sweet flavor of spaghetti squash and transforms it with a luscious blend of cheeses, garlic, and herbs into a creamy, golden-baked masterpiece. It’s like all the comfort of a classic au gratin but way lighter and with a fun twist, perfect for anyone wanting to enjoy a hearty meal without the heavy carbs.

Ingredients You’ll Need
These ingredients are wonderfully straightforward yet come together to create a dish that’s bursting with flavor and the perfect balance of creaminess and texture. Each ingredient plays a key role—from the tender spaghetti squash strands providing a light base to the combo of cheeses that add richness and a beautiful crust.
- 3 cups cooked spaghetti squash (pulled apart): Provides a vegetable-based, noodle-like texture that’s naturally gluten-free and low-calorie.
- 2 eggs: Acts as a binder to hold the creamy mixture together when baked.
- 1 cup shredded mozzarella: Adds gooey, stretchy cheesiness that melts beautifully.
- 1/2 cup plain Greek yogurt: Brings tanginess and creaminess while keeping the dish light and moist.
- 2 tablespoons minced garlic: Infuses the dish with warm, aromatic depth.
- 1/2 teaspoon dried thyme: Gives a subtle earthy herbal note that enhances all the flavors.
- Salt (to preference): Balances and amplifies the overall taste.
- Pepper (to preference): Adds a gentle heat and complexity to the dish.
- 1/2 cup grated Parmesan: Crust topper that crisps up golden and adds a sharp, nutty kick.
How to Make Creamy Spaghetti Squash Au Gratin Recipe
Step 1: Prepare and Cook the Spaghetti Squash
Begin by roasting or steaming your spaghetti squash until tender and easily pulled apart into strands. This veggie base is essential as it mimics pasta while keeping things light and nutritious. Make sure you fluff the squash well so the cheesy mixture can meld into every strand.
Step 2: Mix the Creamy Filling
In a large bowl, whisk together the eggs, shredded mozzarella, plain Greek yogurt, minced garlic, dried thyme, salt, and pepper. This mixture is where all the rich, creamy magic happens. The eggs give structure, the yogurt keeps it luscious, and the garlic and thyme infuse it with irresistible flavor.
Step 3: Combine Squash and Mixture
Fold the cooked spaghetti squash gently into the creamy cheese mixture, ensuring that the strands are evenly coated. This step is important—you want every bite to have that perfect blend of squash and creamy cheesiness.
Step 4: Assemble and Sprinkle Parmesan
Transfer the mixture to a greased baking dish and spread it into an even layer. Sprinkle the grated Parmesan evenly on top to create a golden, crispy crust once baked.
Step 5: Bake Until Golden and Bubbling
Bake in a preheated oven (around 375°F or 190°C) until the top is beautifully golden and the filling is set, typically about 30–35 minutes. The aroma of baking cheese and garlic turning golden is your signal that it’s time to enjoy.
How to Serve Creamy Spaghetti Squash Au Gratin Recipe
Garnishes
Fresh herbs like chopped parsley or basil sprinkled on top just before serving add a burst of color and fresh flavor to this already rich dish. A small drizzle of extra virgin olive oil or a light scattering of red pepper flakes can also elevate the presentation and taste.
Side Dishes
This Creamy Spaghetti Squash Au Gratin Recipe pairs beautifully with light, crisp sides such as a simple mixed green salad with lemon vinaigrette or steamed green beans with a squeeze of lemon. The freshness of the sides balances out the creamy richness of the gratin wonderfully.
Creative Ways to Present
For a fun twist, serve this dish in individual ramekins for a personal touch that looks stunning on the table. You can also top with toasted breadcrumbs for additional texture, or add a few roasted cherry tomatoes on top for a pop of color and sweetness.
Make Ahead and Storage
Storing Leftovers
Store any leftovers in an airtight container in the refrigerator for 3-4 days. The dish holds up wonderfully and tastes great when reheated, making it perfect for easy lunches or dinners during the week.
Freezing
You can freeze the Creamy Spaghetti Squash Au Gratin Recipe in a freezer-safe container for up to 2 months. Make sure to cool it completely before freezing, then thaw overnight in the refrigerator before reheating.
Reheating
Reheat leftovers in the oven at 350°F (175°C) until warmed through, about 15-20 minutes, to keep the top crisp and the inside creamy. You can also reheat in the microwave for a quicker option, though the texture may be slightly less crisp.
FAQs
Can I use frozen spaghetti squash for this recipe?
Absolutely! Frozen cooked spaghetti squash works well and can save you prep time. Just be sure to thaw and drain any excess moisture before mixing with the other ingredients to avoid a watery dish.
Is it possible to make this recipe dairy-free?
Yes, you can substitute mozzarella and Parmesan with dairy-free cheese alternatives, and swap Greek yogurt for a plant-based yogurt. The texture and flavor will be slightly different but still delicious.
Can I add other vegetables to the Creamy Spaghetti Squash Au Gratin Recipe?
Definitely! Roasted mushrooms, spinach, or caramelized onions make fantastic additions that enhance both flavor and nutrients without overpowering the dish.
How spicy is this recipe?
This recipe is mild, but you can easily add a pinch of red pepper flakes or a dash of hot sauce to the creamy mixture if you prefer a little heat to complement the garlic and thyme flavors.
What is the best way to tell when it’s done baking?
The top should be golden brown and the filling should be set—meaning it doesn’t jiggle much when you gently shake the baking dish. A slightly crisp top and bubbling edges are signs it’s ready to enjoy!
Final Thoughts
There’s something incredibly satisfying about a warm, cheesy dish that also feels a little wholesome, and the Creamy Spaghetti Squash Au Gratin Recipe delivers exactly that. Whether you’re looking for a comforting weeknight dinner or a special side to impress guests, this recipe is sure to delight your taste buds and become a go-to in your kitchen. Give it a try—you might just fall in love with spaghetti squash all over again!
Print
Creamy Spaghetti Squash Au Gratin Recipe
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Total Time: 55 minutes
- Yield: 4 servings
- Category: Side Dish
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Description
This Creamy Spaghetti Squash Au Gratin is a delicious low-carb alternative to traditional au gratin dishes, featuring tender spaghetti squash baked in a rich, cheesy sauce made with eggs, Greek yogurt, mozzarella, and Parmesan. Seasoned with garlic and thyme, it offers a comforting, creamy texture with a golden crust, perfect as a nutritious side or vegetarian main dish.
Ingredients
Spaghetti Squash Mixture
- 3 cups cooked spaghetti squash, pulled apart
- 2 eggs
- 1 cup shredded mozzarella cheese
- 1/2 cup plain Greek yogurt
- 2 tablespoons minced garlic
- 1/2 teaspoon dried thyme
- Salt, to taste
- Pepper, to taste
Topping
- 1/2 cup grated Parmesan cheese
Instructions
- Preheat and Prepare. Preheat your oven to 375°F (190°C). While the oven heats, ensure your spaghetti squash is cooked (either roasted or microwaved) and shredded into strands.
- Mix Ingredients. In a large bowl, combine the cooked spaghetti squash, eggs, shredded mozzarella, Greek yogurt, minced garlic, dried thyme, salt, and pepper. Stir well until all ingredients are fully incorporated into a creamy mixture.
- Transfer to Baking Dish. Lightly grease a baking dish, then spread the spaghetti squash mixture evenly in the dish to create a uniform layer.
- Add Parmesan Topping. Sprinkle the grated Parmesan evenly over the top of the squash mixture. This will help form a golden, savory crust during baking.
- Bake Until Golden. Place the baking dish in the preheated oven and bake for about 25-30 minutes, or until the top is bubbly and golden brown and the mixture is set when gently shaken.
- Cool and Serve. Remove from the oven and allow the dish to rest for 5 minutes before serving. This helps to set the creamy texture for easier slicing and serving.
Notes
- To cook spaghetti squash, halve and roast it at 400°F for 40 minutes or microwave for 10-12 minutes until tender.
- Use full-fat Greek yogurt for a creamier texture; low-fat options may produce a less rich dish.
- Adjust garlic and thyme amounts to suit your taste preferences.
- This dish reheats well and can be stored in the refrigerator for up to 3 days.
- For a crispier top, broil for 2-3 minutes at the end of baking, watching carefully to prevent burning.

