Chicken Alfredo Spaghetti Squash Casserole

This Chicken Alfredo Spaghetti Squash Casserole is creamy, cheesy, and packed with flavor! 🍗🍝 A low-carb twist on the classic Alfredo pasta, this dish is perfect for meal prep, weeknight dinners, or even a cozy family meal.

Spaghetti squash replaces traditional pasta, giving you all the creamy, garlicky Alfredo goodness without the extra carbs. Plus, it’s easy to make and requires just a handful of ingredients!

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⭐ Why You’ll Love This Recipe

✔ Low-Carb & Gluten-Free – A great alternative to pasta dishes!
✔ Creamy, Cheesy & Satisfying – Comfort food without the guilt.
✔ Meal-Prep Friendly – Make ahead and reheat easily.
✔ Customizable – Add veggies, spices, or even bacon for extra flavor!

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🛒 Ingredients & Substitutions

Here’s what you’ll need for this delicious casserole:

🥄 For the Spaghetti Squash:

• 1 medium spaghetti squash – Roasted and shredded 🍽️
• 1 tbsp olive oil – For roasting 🫒
• Salt & pepper – To taste 🧂

🍗 For the Chicken Alfredo Filling:

• 2 cups cooked chicken – Shredded or cubed
• 2 tbsp butter – For richness 🧈
• 3 cloves garlic – Minced 🧄
• 1 cup heavy cream – For that creamy Alfredo texture
• ½ cup chicken broth – Adds depth of flavor 🍲
• 1 cup shredded mozzarella – Melts beautifully 🧀
• ½ cup grated Parmesan – For that classic Alfredo taste
• ½ tsp Italian seasoning – Adds a herby touch 🌿
• ¼ tsp red pepper flakes – Optional, for a little heat 🔥

🔄 Substitutions & Variations:

✔ Swap heavy cream for half-and-half for a lighter version.
✔ Use rotisserie chicken for a quick shortcut.
✔ Add spinach, mushrooms, or sun-dried tomatoes for extra flavor!

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👩‍🍳 Step-by-Step Instructions

🔥 Step 1: Roast the Spaghetti Squash

1. Preheat oven to 400°F (200°C).
2. Cut the spaghetti squash in half lengthwise and scoop out the seeds.
3. Brush with olive oil, season with salt & pepper, and place cut-side down on a baking sheet.
4. Roast for 35–40 minutes until fork-tender.
5. Let cool slightly, then shred into spaghetti-like strands using a fork.

💡 Pro Tip: If short on time, microwave the squash for 8–10 minutes instead!

🍗 Step 2: Make the Alfredo Sauce

1. In a skillet over medium heat, melt butter and sauté garlic until fragrant.
2. Pour in heavy cream and chicken broth, stirring constantly.
3. Add mozzarella and Parmesan, stirring until melted and smooth.
4. Mix in Italian seasoning and red pepper flakes for extra flavor.

💡 Want extra cheesiness? Add cream cheese for a richer sauce!

🥘 Step 3: Assemble the Casserole

1. In a large bowl, mix spaghetti squash, cooked chicken, and Alfredo sauce until well combined.
2. Transfer the mixture to a greased casserole dish.
3. Sprinkle with extra mozzarella and Parmesan on top.

🔥 Step 4: Bake to Perfection

1. Reduce oven temperature to 375°F (190°C).
2. Bake uncovered for 20–25 minutes until bubbly and golden.
3. Broil for an extra 2–3 minutes for a crispy, cheesy top!

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🍽️ Serving Suggestions

This Chicken Alfredo Spaghetti Squash Casserole is delicious on its own, but you can pair it with:

🥗 A fresh side salad – For a light, refreshing contrast.
🥦 Steamed broccoli – Complements the creamy Alfredo sauce.
🥖 Garlic bread – If you’re not worried about carbs!

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🧊 Storage & Reheating

📦 Storing Leftovers:

• Refrigerate in an airtight container for up to 4 days.
• Freeze for up to 2 months in a freezer-safe dish.

🔥 Reheating Instructions:

• Oven: Bake at 350°F (175°C) for 15 minutes.
• Microwave: Heat in 30-second bursts until warm.
• Stovetop: Reheat in a pan over low heat with a splash of cream.

💡 Want to keep it creamy? Add a little extra cream or milk before reheating!

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❓ FAQs (Frequently Asked Questions)

🏆 Can I Make This Ahead of Time?

Yes! Assemble the casserole a day in advance, cover, and refrigerate. Bake when ready!

🍗 Can I Use a Different Protein?

Absolutely! Try it with shrimp, turkey, or even tofu for a twist.

🧀 What’s the Best Cheese to Use?

Mozzarella and Parmesan are classic, but try Gouda, Fontina, or Provolone for a different taste!

🌶️ Can I Make It Spicy?

Yes! Add extra red pepper flakes or hot sauce for a kick!

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🏁 Conclusion – A Must-Try Low-Carb Casserole!

This Chicken Alfredo Spaghetti Squash Casserole is a creamy, cheesy, and satisfying dish that’s perfect for any occasion. Whether you’re meal prepping, feeding a family, or just craving comfort food, this low-carb casserole is a guaranteed hit!

Give it a try and let me know what you think! Happy cooking! 🍽️💛