If you’ve ever wondered how to turn the humble spaghetti squash into a comforting, cheesy masterpiece, this Creamy Spaghetti Squash Au Gratin Recipe is exactly what you need in your culinary repertoire. It blends the delicate, naturally sweet strands of roasted spaghetti squash with a luscious, dreamy cheese sauce, finished off with a crispy golden breadcrumb topping that’s pure perfection. Whether you’re seeking a cozy side dish or a satisfying vegetarian main, this recipe delivers warm, cheesy goodness that will become an instant favorite.

Creamy Spaghetti Squash Au Gratin Recipe - Recipe Image

Ingredients You’ll Need

The magic of this dish lies in its simplicity—each ingredient plays a crucial role to create layers of flavor and texture. From the tender spaghetti squash strands to the rich mix of cheeses and that irresistible buttery breadcrumb crust, every element is essential for making a perfectly balanced and satisfying au gratin.

1 medium spaghetti squash: The star ingredient that offers a tender, noodle-like base packed with natural sweetness.
1 tablespoon olive oil: Helps in roasting the squash and adding a subtle richness to its flavor.
2 cups heavy cream: Creates the silky, creamy texture needed for the cheese sauce.
1/2 cup grated Parmesan cheese: Adds sharp, nutty depth to the sauce.
1 cup shredded sharp cheddar cheese: Provides a tangy, melty body for richness.
1/4 cup grated Gruyère cheese: Gives a mellow, slightly sweet and nutty flavor to elevate the sauce complexity.
2 cloves garlic, minced: Infuses the sauce with a gentle aromatic kick.
1/2 teaspoon salt: Enhances all the flavors and balances the sweetness of the squash.
1/4 teaspoon black pepper: Adds a subtle warmth.
1/4 teaspoon ground nutmeg (optional): A classic au gratin spice that adds a hint of sweetness and warmth.
1/2 cup breadcrumbs (preferably panko): For that crunchy, golden topping that contrasts beautifully with the creamy interior.
2 tablespoons unsalted butter, melted: Binds the breadcrumbs and adds a buttery richness.
Fresh parsley, for garnish (optional): Adds a pop of color and fresh flavor when serving.

How to Make Creamy Spaghetti Squash Au Gratin Recipe

Step 1: Roast the Spaghetti Squash

Begin by preheating your oven to 375°F (190°C). Cut the spaghetti squash in half lengthwise and scoop out the seeds—this part gets you ready for that delicate texture. Drizzle each cut side with olive oil and sprinkle with salt and pepper to enhance the natural flavor. Place the squash halves cut-side down on a baking sheet and roast for 30 to 40 minutes. You’ll know it’s done when the flesh is tender and easily separates into spaghetti-like strands with a fork. Roasting also deepens the flavor, which makes every bite deliciously sweet and savory.

Step 2: Prepare the Cheese Sauce

While the squash roasts, it’s time to make the star sauce. In a saucepan set over medium heat, pour in your heavy cream and add the Parmesan, sharp cheddar, and Gruyère cheeses. Stir continuously to melt all the cheeses evenly and create a luxuriously smooth sauce. Then add the minced garlic, salt, black pepper, and if you’re feeling adventurous, a pinch of ground nutmeg. Let the sauce simmer gently for about 2 to 3 minutes, allowing all the flavors to meld perfectly before removing it from the heat.

Step 3: Combine Squash with Cheese Sauce

When the squash is cool enough to handle, use a fork to shred the flesh into those delightful, spaghetti-like strands. These strands are the perfect base for soaking up the cheesy sauce. Transfer the strands into a large bowl and pour in your cheese sauce, folding it gently until every bite is coated in creamy, cheesy goodness. This step ensures that no squash strand is left behind or bland.

Step 4: Assemble and Add Topping

Next, grease a 9×9-inch baking dish and pour in your cheesy squash mixture. It’s starting to look like the classic comfort food we love! Now for the irresistible topping: combine the breadcrumbs with melted butter and sprinkle this golden mixture evenly over the surface. This layer will turn delectably crispy and add the perfect contrast to the creamy filling beneath.

Step 5: Bake to Perfection

Bake your assembled dish for 15 to 20 minutes, until the top is gloriously golden and crunchy. For an extra touch of color and crust, pop the dish under the broiler for 1 to 2 minutes, watching carefully so it doesn’t burn. This final step gives the au gratin its signature inviting, bubbly crust that’s impossible to resist.

Step 6: Rest and Garnish

Remove the dish from the oven and let it sit for a few minutes to settle. This also helps the sauce thicken slightly for easier serving. If you like, sprinkle fresh parsley on top to brighten the dish with a pop of green and a hint of freshness—such a nice balance to the rich flavors!

How to Serve Creamy Spaghetti Squash Au Gratin Recipe

Garnishes

Simple is often best with this dish. A sprinkle of chopped fresh parsley or chives adds a lovely fresh note and some color contrast. For an even more indulgent touch, a light drizzle of truffle oil or a few shavings of extra Parmesan can elevate the presentation and flavor.

Side Dishes

This creamy spaghetti squash au gratin pairs wonderfully with light, vibrant sides. Consider a crisp green salad dressed with lemon vinaigrette to cut through the richness or roasted seasonal vegetables for a harmonious plate. If you want protein, something like grilled chicken or seared salmon complements the dish without overpowering it.

Creative Ways to Present

Want to impress dinner guests? Serve individual portions in small ramekins with a golden breadcrumb crust for an elegant touch. Or stuff the roasted spaghetti squash shells with the au gratin mixture and bake them in their natural bowls for a rustic, charming presentation that highlights the star vegetable.

Make Ahead and Storage

Storing Leftovers

Leftovers are surprisingly good! After cooling, transfer the creamy spaghetti squash au gratin into an airtight container and refrigerate for up to 3 days. The flavors develop even more, making it a great make-ahead dish for busy weeknights.

Freezing

This dish freezes well in portions. Place servings in freezer-safe containers and freeze for up to 2 months. When ready, thaw overnight in the fridge before reheating to preserve texture and flavor.

Reheating

To reheat, bake in a 350°F (175°C) oven covered with foil for about 20 minutes until warmed through. For that crispy top, remove the foil and broil for a couple of minutes at the end. Alternatively, gently microwave on medium heat, stirring halfway for even warming, but you may lose some crispiness.

FAQs

Can I use a different type of cheese in this recipe?

Absolutely! While Parmesan, cheddar, and Gruyère give this dish its classic flavor, feel free to experiment with Swiss, mozzarella, or even fontina for different melty textures and tastes.

Is spaghetti squash healthy compared to pasta?

Yes, spaghetti squash is lower in calories and carbohydrates than traditional pasta, making it a great option for those looking for a lighter or gluten-free alternative while still enjoying a comforting dish.

Can I make this recipe vegan?

With some tweaks, yes! Substitute the heavy cream with full-fat coconut milk or cashew cream, use vegan cheese alternatives, and replace butter with plant-based oil or margarine. The texture and flavor will differ but still deliciously satisfying.

What if I don’t have panko breadcrumbs?

You can use regular breadcrumbs, crushed crackers, or even finely chopped nuts for the topping—just keep in mind that panko creates the lightest, crispiest crust.

How do I know when the spaghetti squash is done roasting?

The flesh should be tender and easily shredded into strands with a fork. If your fork meets resistance, give it a few more minutes in the oven. Roasting times vary slightly depending on size and oven.

Final Thoughts

There’s something so comforting about the Creamy Spaghetti Squash Au Gratin Recipe that makes it an absolute joy to prepare and enjoy. It’s both indulgent and wholesome, comforting and fresh, perfect for sharing with family or friends on any occasion. Give it a try—you just might find your new go-to comfort food that’s equally satisfying and a little bit special.

Creamy Spaghetti Squash Au Gratin Recipe

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4.2 from 65 reviews

Author: admin
Total Time: 55 minutes
Yield: 4 servings 1x
Diet: Gluten Free

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Description

This Creamy Spaghetti Squash Au Gratin is a comforting, low-carb alternative to traditional potato gratin. Roasted spaghetti squash strands are combined with a rich cheese sauce made from Parmesan, cheddar, and Gruyère, then topped with buttery breadcrumbs and baked to a golden, crispy perfection. It’s a decadent yet healthy side dish perfect for any meal.

Ingredients

Scale

Spaghetti Squash

1 medium spaghetti squash
1 tablespoon olive oil
1/2 teaspoon salt
1/4 teaspoon black pepper

Cheese Sauce

2 cups heavy cream
1/2 cup grated Parmesan cheese
1 cup shredded sharp cheddar cheese
1/4 cup grated Gruyère cheese
2 cloves garlic, minced
1/2 teaspoon salt
1/4 teaspoon black pepper
1/4 teaspoon ground nutmeg (optional)

Topping

1/2 cup breadcrumbs (preferably panko)
2 tablespoons unsalted butter, melted

Garnish

Fresh parsley, for garnish (optional)

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Instructions

Preheat and prepare squash: Preheat the oven to 375°F (190°C). Cut the spaghetti squash in half lengthwise and scoop out the seeds. Drizzle the cut sides with olive oil and season with salt and pepper. Place the squash halves cut-side down on a baking sheet and roast for 30–40 minutes, or until the flesh is tender and easily shredded with a fork.
Make cheese sauce: While the squash roasts, combine the heavy cream, Parmesan, cheddar, and Gruyère cheeses in a saucepan over medium heat. Stir continuously until the cheeses melt and the sauce is smooth. Add minced garlic, salt, pepper, and nutmeg (if using), then simmer gently for 2–3 minutes before removing from heat.
Shred squash flesh: Once the squash is cool enough to handle, use a fork to scrape the flesh into spaghetti-like strands. Place the strands in a large bowl and mix with the prepared cheese sauce until evenly combined.
Assemble in baking dish: Transfer the squash and cheese mixture into a greased 9×9-inch baking dish. In a small bowl, mix the breadcrumbs with melted butter and sprinkle evenly over the top of the squash mixture.
Bake until golden: Bake in the preheated oven for 15–20 minutes until the topping is golden and crispy. For an extra golden finish, broil on high for 1–2 minutes, watching carefully to prevent burning.
Serve and garnish: Remove from the oven and allow to cool for a few minutes. Garnish with fresh parsley if desired. Serve warm and enjoy this creamy, cheesy comfort dish!

Notes

For a nuttier flavor, use freshly grated cheeses rather than pre-shredded.
To make this dish lower in fat, substitute half-and-half for heavy cream.
Breadcrumbs can be substituted with crushed crackers or omit for a gluten-free option.
Make sure to monitor the broiling step closely to avoid burning the breadcrumb topping.
Leftovers can be stored covered in the fridge for up to 3 days and reheated in the oven.

Prep Time: 10 minutes
Cook Time: 45 minutes
Category: Side Dish
Method: Baking
Cuisine: American