Jalapeño Popper Roasted Spaghetti Squash brings the bold, cheesy flavors of a jalapeño popper together with roasted spaghetti squash “noodles” for a satisfying, gluten-free dish. It works beautifully as a hearty side for family dinners or holidays, and can also stand alone as a spicy, comfort-food main.

Fork coming out of bowl of roasted spaghetti squash with cheese sauce

If you love mac and cheese and jalapeño poppers but want a lighter, gluten-free twist, this dish is for you. Roasted spaghetti squash replaces pasta for a lower-carb base while still delivering creamy, cheesy satisfaction. The recipe is easy to scale and only requires about 20 minutes of hands-on time, so you’ll have a flavorful dish on the table with minimal fuss.

This version pairs spicy peppers with cream cheese and shredded spicy cheddar or pepper jack for a sauce that clings to the squash strands. It’s perfect for crisp fall evenings or any time you crave something warm, cheesy, and bright with a touch of heat. Serve alongside roasted pork, grilled chicken, or a simple green salad, or enjoy it as a vegetarian main with a protein-packed side.

Cheesy spaghetti squash in bowl, topped with chopped cilantro

How to roast spaghetti squash

Roasting spaghetti squash is straightforward and brings out a sweet, nutty flavor. Follow these four steps for tender strands:

Cut the squash in half lengthwise. See the next section for safe cutting tips.
Use a fork to scoop out the seeds from each half.
Brush the cut sides with olive oil and season with salt and pepper.
Place cut side down on parchment-lined baking sheet and roast at 400°F for about 45 minutes, until easily pierced with a fork.

For quicker methods, you can also cook spaghetti squash in the microwave or air fryer; the microwave can reduce total cook time if you’re short on time.

How to cut spaghetti squash

Cutting an uncooked spaghetti squash can be tricky. Here are two safe, effective methods:

Electric knife: This makes slicing through the tough skin effortless and fast. If you use an electric knife, stabilize the squash on a cutting board and proceed carefully.
Microwave-aid method: Poke a line of small holes with a paring knife where you plan to cut. Microwave the whole squash for 4–6 minutes to soften the skin, then slice with a sturdy chef’s knife along the line.

Always exercise caution and use a stable cutting surface when handling large winter squash.

How to make jalapeño popper spaghetti squash

Roast one large spaghetti squash (a 5–6 pound squash yields about 6–8 cups of squash strands). Allow the squash to cool 10–15 minutes after roasting.
Use a fork to scrape the long strands from the shell into a large bowl and set aside.
In a medium skillet over medium heat, warm olive oil and sauté diced jalapeños, serrano chiles, and onion for 4–5 minutes. Add minced garlic and cook 1–2 minutes more until fragrant.
Add the cooked vegetables to the bowl of squash strands.
In a large saucepan over medium heat, combine milk and cubed, softened cream cheese. Whisk constantly until smooth and well blended.
Reduce heat to low and stir the spaghetti squash and sautéed vegetables into the cream cheese mixture.
Add shredded spicy cheddar or pepper jack and stir until the cheese melts and the mixture is creamy and cohesive.
Serve immediately, garnished with fresh cilantro or chives if desired.

Spaghetti squash tossed with jalapeno cheese sauce in white baking dish

More spaghetti squash recipe ideas

If you enjoy this recipe, try other variations by swapping proteins, cheeses, or flavor profiles. Popular alternatives include turkey chili-topped squash, Mexican-style stuffed squash, green chili chicken versions, spinach-artichoke mixtures, or shrimp with cilantro-lime for a brighter finish.

Jalapeño Popper Roasted Spaghetti Squash

Jalapeño Popper Roasted Spaghetti Squash combines the tangy creaminess of classic jalapeño poppers with the light, noodle-like texture of roasted spaghetti squash. It’s naturally gluten-free and adaptable to different heat and cheese preferences. This recipe serves about four and is a great make-ahead dish for family meals or potlucks.

Roasted spaghetti squash tossed in a cheese sauce in a white baking dish

Ingredients

1 large spaghetti squash (5–6 lb. recommended)
1 tablespoon olive oil (for roasting)
½ teaspoon kosher salt
½ teaspoon black pepper
1 teaspoon olive oil (for sautéing)
3 jalapeño peppers, seeded and minced
2 serrano chiles, seeded and minced (optional for extra heat)
¼ cup diced onion
2 cloves garlic, minced
1 cup milk
8 ounces cream cheese, softened and cubed
1 cup shredded spicy cheddar or pepper jack cheese

Instructions

Preheat the oven to 400°F.
Cut the spaghetti squash in half lengthwise, remove seeds, brush with 1 tablespoon olive oil, and season with salt and pepper.
Place cut side down on a parchment-lined baking sheet and roast for 45 minutes. Let cool 10–15 minutes.
Scoop the spaghetti-like strands into a large bowl and set aside.
Heat 1 teaspoon olive oil in a medium skillet over medium-high heat. Sauté jalapeños, serranos, and onion for 4–5 minutes; add garlic and cook 1 minute more.
Add the cooked vegetables to the bowl with the squash.
In a large pot over medium heat, whisk together milk and cubed cream cheese until smooth.
Lower heat to low and stir in the squash and sautéed vegetables. Combine well, then add shredded cheese and stir until the sauce is creamy and even.
Serve immediately, garnished with chopped cilantro or chives if desired.

Notes and tips

A 5–6 lb. spaghetti squash yields about 6–8 cups of cooked squash, which is ideal for this recipe.
To adjust spiciness, reduce or omit serrano chiles or remove seeds from jalapeños. For extra heat, include the seeds or add a pinch of cayenne.
Make it lighter by using reduced-fat cream cheese or a milk alternative, though texture and richness will differ slightly.
To reheat, warm gently on the stove over low heat, stirring frequently to prevent the cheese from separating. You can also reheat in a 350°F oven, covered, until warmed through.
Leftovers keep well in the refrigerator for 3–4 days and can be frozen for longer storage; thaw and reheat gently.

Nutrition (approximate per serving)

Serving: 2 servings per portion; Calories: 463 kcal; Carbohydrates: 24 g; Protein: 14 g; Fat: 36 g; Saturated Fat: 18 g; Sodium: 692 mg. These values are estimates and will vary with ingredient brands and portion sizes.