Keto Shrimp Scampi Spaghetti Squash – A Bright, Garlicky Low-Carb Favorite
Shrimp scampi is all about buttery garlic, a squeeze of lemon, and a little heat from red pepper flakes. Swap out pasta for roasted spaghetti squash, and you get the same restaurant-style flavor without the heavy carbs. It’s light but satisfying, quick enough for a weeknight, and special enough for guests.
The textures work beautifully: tender shrimp, strands of squash that twirl like noodles, and a glossy, lemony butter sauce. If you’re craving comfort without the carb crash, this is a keeper.
Ingredients
Method
- Preheat and prep the squash. Heat the oven to 400°F (200°C). Halve the spaghetti squash lengthwise and scoop out the seeds. Drizzle the cut sides with 1 tablespoon olive oil, season with salt and pepper, and place cut side down on a baking sheet lined with parchment.
- Roast until tender. Bake 35–45 minutes, depending on size, until the flesh easily shreds with a fork. It should be tender but not mushy. Let it cool for 5 minutes, then use a fork to pull the strands into “spaghetti.” Pat dry with paper towels if the strands look watery.
- Pat the shrimp dry. While the squash roasts, pat shrimp dry with paper towels. Season lightly with salt and pepper. Dry shrimp sear better and stay juicy.
- Build the scampi base. In a large skillet over medium heat, add 1 tablespoon olive oil and 1 tablespoon butter. When the butter melts, add garlic and red pepper flakes. Cook 30–60 seconds until fragrant—don’t brown it.
- Sear the shrimp. Add the shrimp in a single layer. Cook 1–2 minutes per side until just pink and opaque. Transfer to a plate to avoid overcooking.
- Deglaze and sauce. Pour in the white wine (or broth) and simmer 1–2 minutes, scraping up any browned bits. Add remaining 2 tablespoons butter and stir until the sauce turns glossy. Stir in lemon zest and 1–2 tablespoons lemon juice.
- Toss with squash. Add the spaghetti squash strands to the skillet and toss to coat in the sauce. Return shrimp and any juices to the pan. Warm through for 1 minute. Taste and adjust salt, pepper, and lemon.
- Finish and serve. Turn off the heat and stir in parsley. Serve with extra lemon wedges and a sprinkle of Parmesan if you like. For a bolder finish, add a small pinch more red pepper flakes.
What Makes This Special
This dish brings everything you love about classic scampi into a keto-friendly bowl. The spaghetti squash soaks up the sauce while keeping things bright and fresh.
You get a strong garlic-lemon profile with just enough red pepper to wake it up. It’s simple to make, easy to customize, and naturally gluten-free. Best of all, it feels like real pasta night—without the pasta.
Shopping List
- 1 medium spaghetti squash (about 2.5–3 pounds)
- 1 pound large shrimp, peeled and deveined (tails on or off)
- 3 tablespoons unsalted butter
- 2 tablespoons extra-virgin olive oil
- 4–5 cloves garlic, finely minced
- 1/2 teaspoon red pepper flakes (adjust to taste)
- 1 lemon (zest and juice)
- 1/3 cup dry white wine (or low-sodium chicken broth)
- Salt and freshly ground black pepper
- 2 tablespoons fresh parsley, chopped
- Grated Parmesan or pecorino (optional, for serving)
- Extra lemon wedges (optional)
How to Make It
- Preheat and prep the squash. Heat the oven to 400°F (200°C).
Halve the spaghetti squash lengthwise and scoop out the seeds. Drizzle the cut sides with 1 tablespoon olive oil, season with salt and pepper, and place cut side down on a baking sheet lined with parchment.
- Roast until tender. Bake 35–45 minutes, depending on size, until the flesh easily shreds with a fork. It should be tender but not mushy.
Let it cool for 5 minutes, then use a fork to pull the strands into “spaghetti.” Pat dry with paper towels if the strands look watery.
- Pat the shrimp dry. While the squash roasts, pat shrimp dry with paper towels. Season lightly with salt and pepper. Dry shrimp sear better and stay juicy.
- Build the scampi base. In a large skillet over medium heat, add 1 tablespoon olive oil and 1 tablespoon butter.
When the butter melts, add garlic and red pepper flakes. Cook 30–60 seconds until fragrant—don’t brown it.
- Sear the shrimp. Add the shrimp in a single layer. Cook 1–2 minutes per side until just pink and opaque.
Transfer to a plate to avoid overcooking.
- Deglaze and sauce. Pour in the white wine (or broth) and simmer 1–2 minutes, scraping up any browned bits. Add remaining 2 tablespoons butter and stir until the sauce turns glossy. Stir in lemon zest and 1–2 tablespoons lemon juice.
- Toss with squash. Add the spaghetti squash strands to the skillet and toss to coat in the sauce.
Return shrimp and any juices to the pan. Warm through for 1 minute. Taste and adjust salt, pepper, and lemon.
- Finish and serve. Turn off the heat and stir in parsley.
Serve with extra lemon wedges and a sprinkle of Parmesan if you like. For a bolder finish, add a small pinch more red pepper flakes.
Keeping It Fresh
Spaghetti squash can get watery if it sits. To keep it fresh, store the squash and shrimp scampi sauce separately when possible.
The squash strands hold best in an airtight container lined with a paper towel to absorb moisture. Refrigerate up to 3 days. Reheat gently over medium heat with a splash of broth or olive oil to loosen the sauce.
Avoid microwaving the shrimp too long; it can turn rubbery.
Why This is Good for You
- Low-carb and gluten-free: Spaghetti squash replaces pasta, keeping carbs in check while still feeling substantial.
- Protein-rich: Shrimp provides lean protein, helping you feel full and satisfied.
- Healthy fats: Olive oil and butter deliver flavor and help with absorption of fat-soluble vitamins, supporting a keto approach.
- Micronutrient boost: Lemon and parsley add vitamin C and antioxidants, while garlic supports heart-health benefits.
Common Mistakes to Avoid
- Overcooking the squash: That leads to mushy strands. Check early, and pull it once you can shred it cleanly with a fork.
- Skipping the pat-dry step: Wet shrimp steam instead of sear, which dulls flavor and texture.
- Burning the garlic: It turns bitter fast. Keep heat moderate and stir constantly when the garlic hits the pan.
- Forgetting to reduce the wine/broth: A quick simmer concentrates flavor and prevents a watery sauce.
- Under-seasoning: The squash is mild.
Taste and adjust with salt, pepper, and lemon at the end.
Alternatives
- Protein swap: Try scallops, chunks of salmon, or chicken tenders. Adjust cook times so they don’t overcook.
- Dairy-free: Use all olive oil and finish with a knob of vegan butter or a splash of coconut cream for richness.
- Extra veggies: Toss in zucchini ribbons, baby spinach, or cherry tomatoes (halved) during the sauce step.
- Herb twist: Basil or dill can replace parsley for a fresh change. Add at the end so it stays bright.
- Citrus switch: Try a mix of lemon and a touch of lime for a sharper kick.
- No wine on hand: Use chicken broth plus 1 teaspoon apple cider vinegar or extra lemon juice for acidity.
FAQ
Is spaghetti squash really low-carb?
Yes.
Compared to regular pasta, spaghetti squash is significantly lower in carbs and calories. It’s a popular choice for keto and low-carb diets while still giving you a noodle-like experience.
Can I cook the spaghetti squash in the microwave?
Yes. Pierce the whole squash several times with a knife, microwave 5–7 minutes to soften, then halve, seed, and microwave cut side down in a dish with a little water for 8–12 minutes more.
Check often and avoid overcooking.
Do I have to use wine in the sauce?
No. Low-sodium chicken broth works well. Add a small splash of lemon juice or vinegar to mimic the acidity that wine brings.
How do I prevent watery spaghetti squash?
Roast cut side down for better evaporation, then fluff the strands and let steam escape for a few minutes.
If needed, lay the strands on paper towels and gently press to absorb excess moisture before tossing with the sauce.
What size shrimp works best?
Large shrimp (about 16–20 per pound) strike a nice balance. They cook quickly but still have a meaty bite. Smaller shrimp cook faster, so watch them closely.
Can I make this ahead?
You can roast the squash a day ahead and refrigerate the strands.
Cook the shrimp and sauce fresh for the best texture, then toss everything together just before serving.
Is Parmesan keto-friendly?
Yes. Parmesan is low in carbs and high in flavor. Use a light sprinkle to keep sodium in check, or skip it if you’re going dairy-free.
How spicy is this recipe?
It has a gentle heat from red pepper flakes.
Start with 1/4 teaspoon if you’re sensitive, or go up to 3/4 teaspoon if you like more kick.
Final Thoughts
Keto Shrimp Scampi Spaghetti Squash delivers big flavor with simple ingredients. It’s fast, fresh, and flexible, with a silky sauce that coats every strand. Keep a spaghetti squash on hand, a bag of shrimp in the freezer, and you’re halfway to dinner.
Once you taste how bright and satisfying this is, it will earn a regular spot in your weeknight rotation.
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