Keto Tuscan Chicken Spaghetti Squash – Creamy, Comforting, and Low-Carb
This Keto Tuscan Chicken Spaghetti Squash brings all the rich, creamy flavor of a classic Tuscan chicken pasta without the carbs that weigh you down. It’s cozy and satisfying, with tender chicken, sun-dried tomatoes, spinach, and a garlicky Parmesan cream sauce. Using roasted spaghetti squash as the “noodles” keeps it light while still feeling indulgent.
If you’re craving comfort food on a keto or low-carb plan, this one is a weeknight win. It’s simple enough for busy nights but special enough to serve guests.
Ingredients
Method
- Roast the squash: Preheat your oven to 400°F (200°C). Halve the spaghetti squash lengthwise and scoop out the seeds. Rub the cut sides with olive oil, season with salt and pepper, and place cut-side down on a parchment-lined baking sheet. Roast for 30–40 minutes, until the strands pull apart easily with a fork but still have a slight bite.
- Prep the chicken: While the squash roasts, pat chicken dry and season both sides with salt, pepper, and half the Italian seasoning.
- Sear the chicken: Heat a large skillet over medium-high heat with 1–2 tablespoons olive oil (or oil from the sun-dried tomatoes). Sear chicken 4–5 minutes per side until browned and cooked through (165°F/74°C). Transfer to a plate and tent with foil. Let it rest, then slice or cube.
- Sauté aromatics: Lower heat to medium. Add butter if using. Stir in minced garlic and chopped sun-dried tomatoes. Cook 1 minute until fragrant, scraping up any browned bits.
- Make the sauce: Pour in chicken broth and simmer 2 minutes. Add heavy cream, remaining Italian seasoning, and a pinch of red pepper flakes if you like heat. Simmer gently 3–4 minutes to thicken slightly, stirring often.
- Add greens and cheese: Stir in spinach and let it wilt. Sprinkle in Parmesan a little at a time, stirring until smooth. Taste and adjust salt and pepper. The sauce should be creamy and well seasoned.
- Combine with chicken: Add the sliced chicken back to the skillet and coat with the sauce. Keep warm on low.
- Shred the squash: When the squash is cool enough to handle, use a fork to pull the strands into “spaghetti.” You can serve it in the squash boats or transfer to a wide bowl.
- Assemble: Spoon the Tuscan chicken and sauce over the squash strands. Toss gently to coat, or plate the squash and top with chicken. Garnish with extra Parmesan and fresh basil if you’d like.
- Serve: Plate immediately while hot. Add a squeeze of lemon if you want a brighter finish.
Why This Recipe Works
This recipe balances richness with freshness. The spaghetti squash has a mild sweetness and a light, noodle-like texture that pairs perfectly with the creamy sauce.
Chicken thighs add more flavor and stay juicier than breasts, while sun-dried tomatoes bring tang and depth. Fresh spinach softens into the sauce for color and nutrients without complicating the dish. Best of all, it’s a one-pan sauce poured over roasted squash, so cleanup stays manageable.
Shopping List
- Spaghetti squash (1 large or 2 small, about 3–4 pounds total)
- Olive oil (plus some oil from the sun-dried tomatoes if packed in oil)
- Chicken thighs (boneless, skinless; about 1.5 pounds) or chicken breasts if preferred
- Garlic (3–4 cloves, minced)
- Sun-dried tomatoes (1/3 cup, chopped; ideally packed in oil)
- Baby spinach (3–4 cups, loosely packed)
- Heavy cream (1 cup)
- Chicken broth (1/2 cup; low-sodium)
- Parmesan cheese (3/4 cup, freshly grated)
- Italian seasoning (1 teaspoon) or a mix of oregano, basil, and thyme
- Crushed red pepper flakes (optional, for heat)
- Salt and black pepper
- Fresh basil (optional, for garnish)
- Butter (1 tablespoon, optional for added richness)
Instructions
- Roast the squash: Preheat your oven to 400°F (200°C).
Halve the spaghetti squash lengthwise and scoop out the seeds. Rub the cut sides with olive oil, season with salt and pepper, and place cut-side down on a parchment-lined baking sheet. Roast for 30–40 minutes, until the strands pull apart easily with a fork but still have a slight bite.
- Prep the chicken: While the squash roasts, pat chicken dry and season both sides with salt, pepper, and half the Italian seasoning.
- Sear the chicken: Heat a large skillet over medium-high heat with 1–2 tablespoons olive oil (or oil from the sun-dried tomatoes).
Sear chicken 4–5 minutes per side until browned and cooked through (165°F/74°C). Transfer to a plate and tent with foil. Let it rest, then slice or cube.
- Sauté aromatics: Lower heat to medium.
Add butter if using. Stir in minced garlic and chopped sun-dried tomatoes. Cook 1 minute until fragrant, scraping up any browned bits.
- Make the sauce: Pour in chicken broth and simmer 2 minutes.
Add heavy cream, remaining Italian seasoning, and a pinch of red pepper flakes if you like heat. Simmer gently 3–4 minutes to thicken slightly, stirring often.
- Add greens and cheese: Stir in spinach and let it wilt. Sprinkle in Parmesan a little at a time, stirring until smooth.
Taste and adjust salt and pepper. The sauce should be creamy and well seasoned.
- Combine with chicken: Add the sliced chicken back to the skillet and coat with the sauce. Keep warm on low.
- Shred the squash: When the squash is cool enough to handle, use a fork to pull the strands into “spaghetti.” You can serve it in the squash boats or transfer to a wide bowl.
- Assemble: Spoon the Tuscan chicken and sauce over the squash strands.
Toss gently to coat, or plate the squash and top with chicken. Garnish with extra Parmesan and fresh basil if you’d like.
- Serve: Plate immediately while hot. Add a squeeze of lemon if you want a brighter finish.
Storage Instructions
Store leftovers in an airtight container in the refrigerator for up to 3–4 days.
Keep the squash and sauce separate if possible to prevent sogginess. Reheat gently on the stovetop over low heat, adding a splash of broth or cream to loosen the sauce. Avoid microwaving on high heat for long periods, which can split the cream and make the chicken rubbery.
This dish does not freeze well due to the dairy-based sauce.
Health Benefits
- Low in carbs: Spaghetti squash keeps net carbs in check, making this recipe keto-friendly.
- High in protein: Chicken delivers satisfying protein to keep you full longer.
- Healthy fats: Olive oil, cream, and Parmesan provide fats that support ketosis and add flavor.
- Micronutrients: Spinach adds iron, folate, and vitamin K, while squash brings fiber and vitamin A.
- Balanced satisfaction: Creamy texture and savory flavors help curb cravings for traditional pasta without the blood sugar spike.
What Not to Do
- Don’t overbake the squash: Mushy squash turns watery and won’t hold the sauce well. Aim for tender strands with a slight bite.
- Don’t boil the sauce hard: A rolling boil can cause dairy to separate. Keep it at a gentle simmer.
- Don’t skip seasoning: Taste the sauce before serving.
Parmesan is salty, but you’ll still need balanced salt, pepper, and herbs.
- Don’t crowd the pan when searing: Overcrowding steams the chicken. Work in batches if needed for a good sear.
- Don’t add spinach too early: Add it near the end to keep color and texture vibrant.
Variations You Can Try
- Dairy-light version: Use more broth and a splash of coconut cream instead of full heavy cream. Add extra Parmesan for body.
- With mushrooms: Sauté sliced cremini or shiitake after the chicken for an earthy boost.
- Creamy pesto twist: Stir 1–2 tablespoons of pesto into the sauce for fresh basil and garlic notes.
- Spicy Calabrian kick: Swap red pepper flakes for chopped Calabrian chiles for deeper heat.
- Chicken breast option: Use thinly sliced chicken breasts and reduce sear time to keep them tender.
- Bacon lover’s version: Crisp 2–3 slices of bacon first, cook the chicken in some of the drippings, and crumble bacon over the top.
- Extra veggies: Add sautéed zucchini ribbons or roasted cherry tomatoes to bulk it up without extra carbs.
FAQ
Is spaghetti squash keto-friendly?
Yes.
Spaghetti squash is lower in carbs than pasta and works well in moderate portions on a keto or low-carb plan. Exact carbs vary by size, so measure your serving if you track macros.
Can I make this dairy-free?
You can. Use full-fat coconut milk or coconut cream in place of heavy cream and a dairy-free Parmesan alternative.
The flavor shifts slightly but still tastes rich and satisfying.
How do I prevent a watery sauce?
Roast the squash cut-side down and don’t overcook it. Let it cool slightly, then fluff the strands and let extra steam escape. Simmer the sauce gently until it thickens before combining everything.
What can I use instead of sun-dried tomatoes?
Roasted red peppers work well and keep carbs low.
For a brinier note, try a few chopped olives. If you skip them entirely, add a squeeze of lemon for brightness.
Can I grill the chicken?
Absolutely. Grilled chicken adds a nice smoky flavor.
Slice it and toss with the sauce at the end, just as you would with seared chicken.
How do I know when the squash is done?
Insert a fork and pull lightly; the strands should separate easily but remain slightly firm. If they’re mushy, it’s overcooked. If they resist, give it another 5–10 minutes.
Can I meal prep this?
Yes.
Roast the squash and cook the chicken and sauce ahead. Store separately and combine when reheating for the best texture.
What herbs work best?
Italian seasoning is easy and consistent. Fresh basil or thyme added at the end brightens the dish without overpowering the sauce.
How spicy is it?
As written, it’s mild.
Add more red pepper flakes or Calabrian chiles if you prefer more heat.
What can I serve with it?
A simple arugula salad with olive oil and lemon balances the richness without adding carbs. Steamed asparagus or roasted broccoli are great sides, too.
Final Thoughts
Keto Tuscan Chicken Spaghetti Squash checks all the boxes: creamy, flavorful, and weeknight-friendly. It gives you the comfort of a classic pasta dish while staying aligned with low-carb goals.
With a handful of pantry staples and a few fresh ingredients, you get a satisfying meal that feels special but doesn’t take all night. Keep this one in your rotation for busy evenings, and don’t be surprised if it becomes a regular request at your table.
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