Keto Lemon Butter Shrimp Spaghetti Squash – Bright, Comforting, and Low-Carb

This is the kind of weeknight dinner that makes you feel like you cooked something special without spending all night in the kitchen. Tender strands of roasted spaghetti squash stand in for pasta, soaking up a rich lemon-garlic butter sauce. Juicy shrimp cook in minutes and bring restaurant-level flavor with hardly any effort.

The whole dish is fresh, cozy, and light all at once. If you’re eating low-carb or simply want a lighter pasta night, this one hits every note.

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Keto Lemon Butter Shrimp Spaghetti Squash - Bright, Comforting, and Low-Carb

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Prep Time 15 minutes mins

Cook Time 35 minutes mins

Total Time 50 minutes mins

Servings: 4 servings

Ingredients Method

Ingredients

  

• 1 medium spaghetti squash (about 2.5–3 pounds)
• 1.5 pounds large shrimp, peeled and deveined (tails on or off)
• 4 tablespoons unsalted butter
• 2 tablespoons extra-virgin olive oil, divided
• 4 cloves garlic, minced
• Zest of 1 lemon
• 3 tablespoons fresh lemon juice (about 1 large lemon)
• 1/4 teaspoon red pepper flakes (optional, to taste)
• Salt and freshly ground black pepper
• 1/4 cup grated Parmesan or Pecorino Romano (optional but delicious)
• 2 tablespoons chopped fresh parsley (or basil), plus more for garnish
• Lemon wedges, for serving

Method

 

1. Preheat and prep the squash: Heat your 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 and season with salt and pepper.
2. Roast until tender: Place cut side down on a parchment-lined baking sheet. Roast for 35–45 minutes, or until the flesh strands easily with a fork. Thicker squash may need a few extra minutes.
3. Fluff the “noodles”: Let the squash cool slightly. Use a fork to scrape the flesh into spaghetti-like strands. Taste and season with a pinch of salt if needed.
4. Pat the shrimp dry: While the squash roasts, pat shrimp very dry with paper towels. Season with salt, pepper, and a pinch of red pepper flakes if you like heat.
5. Make the lemon butter base: In a large skillet over medium heat, melt the butter with 1 tablespoon olive oil. Add the minced garlic and cook 30–45 seconds until fragrant, not browned.
6. Cook the shrimp: Add shrimp in a single layer. Sauté 1–2 minutes per side, just until pink and opaque. Do not overcook. Transfer shrimp to a plate, leaving the garlicky butter in the pan.
7. Build the sauce: Reduce heat to low. Add lemon zest and lemon juice to the skillet, stirring to combine. If you want it extra saucy, add a splash of water or chicken broth.
8. Toss in the squash: Add the spaghetti squash strands to the skillet. Toss well so every strand gets coated. Stir in Parmesan (if using) and parsley.
9. Finish and serve: Return shrimp to the pan and toss gently to warm through. Taste and adjust salt, pepper, and lemon. Serve with extra parsley and lemon wedges.

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Why This Recipe Works

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• Spaghetti squash makes a great pasta swap: It’s naturally low-carb, has a mild flavor, and takes on sauces beautifully.
• Lemon butter builds big flavor fast: A simple mix of butter, garlic, lemon juice, and zest gives the shrimp and squash bright, silky depth.
• Quick-cooking protein: Shrimp cook in 3–4 minutes, so you spend more time eating and less time waiting.
• Flexible and forgiving: You can roast the squash ahead, use frozen shrimp, and adjust the heat with red pepper flakes.
• Keto-friendly without compromise: You get comfort food vibes, but with smart macros and wholesome ingredients.

What You’ll Need

• 1 medium spaghetti squash (about 2.5–3 pounds)
• 1.5 pounds large shrimp, peeled and deveined (tails on or off)
• 4 tablespoons unsalted butter
• 2 tablespoons extra-virgin olive oil, divided
• 4 cloves garlic, minced
• Zest of 1 lemon
• 3 tablespoons fresh lemon juice (about 1 large lemon)
• 1/4 teaspoon red pepper flakes (optional, to taste)
• Salt and freshly ground black pepper
• 1/4 cup grated Parmesan or Pecorino Romano (optional but delicious)
• 2 tablespoons chopped fresh parsley (or basil), plus more for garnish
• Lemon wedges, for serving

How to Make It

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1. Preheat and prep the squash: Heat your 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 and season with salt and pepper.

2. Roast until tender: Place cut side down on a parchment-lined baking sheet. Roast for 35–45 minutes, or until the flesh strands easily with a fork. Thicker squash may need a few extra minutes.
3. Fluff the “noodles”: Let the squash cool slightly.

   Use a fork to scrape the flesh into spaghetti-like strands. Taste and season with a pinch of salt if needed.

4. Pat the shrimp dry: While the squash roasts, pat shrimp very dry with paper towels. Season with salt, pepper, and a pinch of red pepper flakes if you like heat.
5. Make the lemon butter base: In a large skillet over medium heat, melt the butter with 1 tablespoon olive oil.

   Add the minced garlic and cook 30–45 seconds until fragrant, not browned.

6. Cook the shrimp: Add shrimp in a single layer. Sauté 1–2 minutes per side, just until pink and opaque. Do not overcook.

   Transfer shrimp to a plate, leaving the garlicky butter in the pan.

7. Build the sauce: Reduce heat to low. Add lemon zest and lemon juice to the skillet, stirring to combine. If you want it extra saucy, add a splash of water or chicken broth.
8. Toss in the squash: Add the spaghetti squash strands to the skillet.

   Toss well so every strand gets coated. Stir in Parmesan (if using) and parsley.

9. Finish and serve: Return shrimp to the pan and toss gently to warm through. Taste and adjust salt, pepper, and lemon.

   Serve with extra parsley and lemon wedges.

Keeping It Fresh

• Storage: Keep leftovers in an airtight container in the fridge for up to 3 days. The sauce will absorb into the squash, deepening flavor.
• Reheating: Warm gently in a skillet over low heat with a small pat of butter or a splash of broth. Avoid microwaving too long to keep shrimp tender.
• Make-ahead tips: Roast and shred the spaghetti squash up to 3 days ahead.

  Store shrimp raw until cooking time for the best texture.

• Freezing: Not ideal. Cooked shrimp can get rubbery, and spaghetti squash may weep water when thawed.

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Benefits of This Recipe

• Low-carb and keto-friendly: Spaghetti squash keeps carbs in check while delivering fiber and micronutrients.
• High in protein: Shrimp offers lean protein with very few carbs.
• Fast, weeknight-friendly: Roast the squash while you prep the sauce, and it all comes together smoothly.
• Bright, satisfying flavor: Lemon, garlic, and butter make a classic combo that tastes rich without being heavy.
• Easy to customize: Add herbs, spice, or a sprinkle of cheese to match your mood.

Common Mistakes to Avoid

• Overcooking the shrimp: They turn tough quickly. Pull them as soon as they turn pink and curl into a loose “C.”
• Waterlogged squash: If the squash releases moisture, cook it in the skillet for 1–2 minutes before adding shrimp to drive off excess water. (Note: HTML corrected below)
• Under-seasoning: Taste as you go.

  Lemon sharpness needs enough salt to balance it.

• Burning the garlic: Keep the heat moderate. Bitter garlic can overpower the dish.
• Skipping the zest: The zest brings aromatic lemon flavor without extra acidity. Don’t leave it out.