Paleo & Dairy-Free Chicken Spaghetti Squash Bake

Creamy Dairy-Free Chicken Spaghetti Squash Casserole: Your Healthy Pasta Alternative

Chicken Spaghetti Squash Casserole in a plate.
A wholesome and satisfying Chicken Spaghetti Squash Casserole, ready to be enjoyed.

Craving a rich, comforting pasta dish but looking for a healthier, guilt-free option? Look no further! This incredible Chicken Spaghetti Squash Casserole is your new go-to. It’s a savory, easy-to-prepare meal featuring tender spaghetti squash strands, succulent shredded chicken, and a luscious, dairy-free cream sauce. This recipe masterfully combines flavor and nutrition, proving that healthy eating can be incredibly delicious and deeply satisfying. Perfect for those who adore creamy casseroles but seek a lighter, more wholesome alternative to traditional grain-based pasta dishes.

What sets this spaghetti squash chicken casserole apart is its versatility and adherence to various dietary needs. It’s not just a healthy meal; it’s a “primal” friendly dish that can effortlessly be adapted to fit a Paleo or Whole30 lifestyle. Simply omit the optional goat cheese, and you have a completely dairy-free and compliant meal. It’s packed with protein and an abundance of vegetables, making it a truly nutrient-dense dinner option that doesn’t compromise on taste. Experience the joy of a creamy, flavorful casserole that nourishes your body and satisfies your soul.

If you’re exploring other healthy casserole ideas, be sure to check out our Zucchini, Eggplant and Ground Turkey Casserole or our Creamy Mustard Tomato Chicken Casserole. These recipes offer diverse flavors and similar health benefits, providing more delicious inspiration for your healthy cooking journey.

Table of Contents

  • What Makes This Recipe Great
  • Recipe Ingredients
  • Additions & Substitutions
  • Step-by-Step Instructions
  • Recipe FAQs
  • Other Squash Recipes You’ll Love
  • Full Recipe Card: Chicken Spaghetti Squash Casserole

What Makes This Recipe Great

This Chicken Spaghetti Squash Casserole stands out for numerous reasons, making it an ideal choice for a wide range of eaters and dietary preferences. It’s more than just a meal; it’s a smart and delicious way to incorporate healthy habits into your routine.

  • Dietary Inclusivity: This casserole is a fantastic recipe for individuals adhering to a Paleo, Gluten-free, Dairy-free, or Grain-free diet. By simply omitting the goat cheese, it becomes fully compliant with these restrictive yet rewarding eating plans. It offers a satisfying and flavorful meal without the common allergens or inflammatory ingredients found in many traditional casseroles.
  • Rich in Nutrients: Packed with an abundance of wholesome vegetables and lean protein, this dish is a nutritional powerhouse. Spaghetti squash provides a fiber-rich, low-carb base, while cauliflower adds even more vitamins and minerals. The chicken breast ensures a substantial protein boost, contributing to satiety and muscle health.
  • Excellent for Meal Prep: One of the best aspects of this casserole is how well it keeps. It makes for incredible leftovers, often tasting even better the next day as the flavors meld and deepen. Prepare a large batch on the weekend, and you’ll have healthy, ready-to-eat meals for several days, simplifying your weeknight dinner planning significantly.
  • Creative Use of Spaghetti Squash: If you’re looking for innovative ways to utilize spaghetti squash beyond simple side dishes, this casserole is a brilliant solution. It transforms this versatile vegetable into a hearty, main course that will surprise and delight your family, showcasing its ability to mimic pasta strands perfectly within a creamy sauce.
  • Comfort Food Remastered: This recipe offers all the comforting warmth and creaminess of a classic casserole without the heavy feeling. It hits all the right notes for those seeking a comforting meal that also aligns with their health and wellness goals.
Spaghetti squash chicken casserole fresh out of the oven.
Golden brown and bubbling, straight from the oven.

Essential Recipe Ingredients

Crafting this delicious casserole requires a thoughtful selection of fresh, high-quality ingredients. Each component plays a crucial role in building the robust flavor profile and creamy texture that makes this dish so irresistible.

  • Spaghetti Squash: A medium-sized spaghetti squash is perfect for this recipe, yielding plenty of “noodles” to create the casserole base. Look for one that feels heavy for its size and has a firm, unblemished rind.
  • Chicken Breast: Approximately 1.5 to 2 pounds of boneless, skinless chicken breast will be boiled and then shredded, providing the lean, protein-packed core of the casserole.
  • Chicken Broth: You’ll need about 32 ounces of chicken broth to boil the chicken. Opt for a high-quality broth with no added sugars or artificial ingredients to keep the dish as wholesome as possible. It also forms a flavorful base for our sauce.
  • Thyme and Rosemary: These classic herbs, about ¼ teaspoon each of dried thyme and rosemary, are essential for seasoning both the chicken and the creamy sauce, infusing the casserole with aromatic, earthy notes.
  • Cauliflower: One whole head of cauliflower, cut into florets, adds a creamy texture and boosts the vegetable content of the dish. It blends seamlessly into the sauce, making it extra rich and nutritious.
  • Garlic and Onion: Freshly minced garlic (2.5 tablespoons or 1.5 tsp powder) and half a yellow onion (or 1.5 tsp powder) are the aromatic backbone of the casserole, providing depth and savory flavor.
  • Olive Oil: A tablespoon of good quality olive oil is used to sauté the aromatics and roast the spaghetti squash, adding a subtle fruitiness and helping achieve a golden finish.
  • Nutmeg: A touch of nutmeg (¼ teaspoon) is a secret ingredient that elevates the dairy-free cream sauce, adding a warm, subtle spice that complements the other flavors beautifully.
  • Coconut Cream: One can of full-fat coconut cream is the star of our dairy-free sauce. It provides a luxurious, rich texture similar to heavy cream without any dairy, making the casserole wonderfully creamy.
  • Coconut Flour: Three teaspoons of coconut flour, or 1 tablespoon of tapioca flour, act as a natural thickener for the sauce, helping it achieve the perfect consistency and ensuring all the ingredients are beautifully coated.
  • Goat Cheese: (Optional) Half a cup of crumbled goat cheese is added to the top of the casserole for those who enjoy a tangy, slightly salty finish. Omit for a strict Paleo or Whole30 diet.
  • Salt and Pepper: Essential for seasoning to taste. Use 1 teaspoon of salt and ½ teaspoon of pepper, adjusting as desired. Omit pepper for AIP compliance.

For precise measurements and a detailed list, please refer to the full recipe card at the bottom of this page.

Additions & Substitutions

This recipe is incredibly flexible, allowing for various adjustments to suit your pantry, preferences, or dietary needs. Feel free to get creative!

  • Broth Options: Instead of regular chicken broth, you can opt for bone broth. This not only enhances the savory flavor but also provides extra protein and beneficial collagen, making your casserole even more nourishing.
  • Thickeners: While coconut flour works wonderfully, tapioca flour (1 tablespoon) is an excellent alternative if you prefer its texture or have it on hand. Both will help thicken the creamy sauce effectively.
  • Dairy-Free & Paleo: To ensure this casserole is completely Paleo and Dairy-free, simply omit the crumbled goat cheese from the topping. The dish will still be incredibly flavorful and satisfying. For Whole30, removing the goat cheese is also necessary.
  • Extra Vegetables: Enhance the nutritional value by adding more non-starchy vegetables. Sautéed mushrooms, spinach, or diced bell peppers could be lovely additions to the mix.
  • Spice It Up: For a kick, a pinch of red pepper flakes can be added to the sauce along with the other seasonings.
  • Different Proteins: While chicken is classic, cooked turkey or even shredded pork could be used as a substitute for a different flavor profile.
  • Herbs: Experiment with other herbs like oregano or marjoram to find your favorite blend. Fresh herbs, finely chopped, can also elevate the flavor significantly if added towards the end of cooking.

Step-by-Step Instructions

Follow these detailed steps to create a delicious and healthy Chicken Spaghetti Squash Casserole. Precision and patience will lead to a perfect, comforting meal.

Spaghetti squash baked in the oven.
Step 1: Spaghetti squash halves ready after baking.

Step 1: Prepare and Bake the Spaghetti Squash. Begin by preheating your oven to 400°F (200°C). Line a baking sheet with aluminum foil for easy cleanup. Carefully cut the spaghetti squash in half lengthwise. Using a spoon, scoop out and discard the seeds and stringy pulp from the center. Lightly brush or spray the cut surfaces of the squash with olive oil. Place the squash halves face down on the prepared baking sheet. Roast in the preheated oven for 30-40 minutes, or until the squash is tender when pierced with a fork. The flesh should be easily separated into spaghetti-like strands. Once cooked, remove from the oven and allow it to cool enough to handle.

Shredded chicken in a bowl.
Step 2: Perfectly shredded chicken for the casserole.

Step 2: Cook and Shred the Chicken. While the spaghetti squash is baking, place the chicken breasts in a large pot. Pour 32 ounces of chicken broth over the chicken, ensuring it’s mostly submerged. Add ¼ teaspoon of dried rosemary and ¼ teaspoon of dried thyme to the pot. Bring the broth to a boil, then reduce the heat to a simmer, cover the pot, and cook for about 30 minutes, or until the chicken is thoroughly cooked through and easily shredded. Remove the chicken from the pot, reserving 1 cup of the flavorful cooking liquid. Using two forks, shred the cooked chicken breast and set it aside in a bowl.

Steamed cauliflower.
Step 3: Steamed cauliflower florets.

Step 3: Boil the Cauliflower. In parallel with the other cooking processes, fill another saucepan with water and bring it to a boil. Add the cauliflower florets (from one head of cauliflower, cut into smaller pieces for faster cooking) to the boiling water. Cook for approximately 11 minutes, or until the cauliflower is very tender. This ensures it will blend smoothly into the creamy sauce. Once tender, remove from heat, drain thoroughly, and set aside.

Spaghetti Squash Chicken Casserole before baking.
Step 4: Mixed casserole ingredients in a baking dish, before the final bake.

Step 4: Prepare the Cream Sauce and Assemble the Casserole. In a large pan, heat 1 tablespoon of olive oil over medium heat. Add the minced garlic and chopped onion, sautéing for about 4 minutes until softened and fragrant. Stir in the entire can of coconut cream, along with 1 teaspoon of salt, ½ teaspoon of pepper (if using), and ¼ teaspoon of nutmeg (if using). Add 3 teaspoons of coconut flour (or 1 tablespoon of tapioca flour) and the reserved 1 cup of chicken stock from cooking the chicken. Bring the mixture to a gentle boil, then reduce heat and simmer for 8-9 minutes, stirring occasionally, until the sauce visibly thickens. Remove from heat.

Once the spaghetti squash is cool enough, use a fork to scrape the flesh from the inside of the halves, creating spaghetti-like strands. Transfer these strands to a large mixing bowl. Add the shredded chicken and the cooked cauliflower to the bowl. Pour the creamy dairy-free sauce over the ingredients and mix everything together thoroughly until well combined and coated. Transfer the entire mixture into a 13×9-inch baking dish. If using, sprinkle ½ cup of crumbled goat cheese evenly over the top of the casserole.

Spaghetti Squash Chicken Casserole after baking.
Step 5: The delicious casserole, golden and ready to serve.

Step 5: Bake and Broil the Casserole. Place the baking dish into the preheated 400°F (200°C) oven and bake for 15 minutes. This allows the flavors to meld and the casserole to heat through. For an extra golden-brown, slightly crisp top, carefully switch your oven to the broil setting (typically High) for an additional 3-5 minutes. Keep a very close eye on it during broiling, as ovens vary, and it can brown quickly or even burn if left unattended for too long. Remove the casserole from the oven when the topping is golden and bubbly. Let it rest for a few minutes before serving to allow it to set.

Enjoy this comforting and healthy casserole! It’s a wonderful dish that brings wholesome ingredients together in a truly delicious way.

Recipe FAQs

Here are some common questions and helpful tips to ensure your Chicken Spaghetti Squash Casserole turns out perfectly every time.

How do you store this recipe?

Once cooled to room temperature, cover the baking dish tightly with aluminum foil or transfer the casserole to an airtight container. Store it in the refrigerator for 3-4 days. This casserole makes fantastic leftovers!

Can you make this in advance?

Absolutely! This casserole is an excellent candidate for meal prep. Follow all the steps up to, but not including, the final baking. Mix all the ingredients, transfer them to your baking dish, and cover tightly. Store in the refrigerator for up to 2 days. When you’re ready to bake, remove it from the fridge at least 30 minutes prior to baking to allow it to come closer to room temperature, then bake as directed (you might need a few extra minutes if baking from cold).

Does spaghetti squash really taste like pasta?

While spaghetti squash offers a texture similar to thin pasta strands, its flavor is distinctly that of a mild, slightly nutty squash. It does not taste exactly like traditional wheat pasta. However, its neutral flavor makes it an ideal canvas for absorbing rich sauces and other ingredients, providing a satisfying, low-carb alternative.

Can I freeze chicken spaghetti squash casserole?

Yes, this casserole freezes well! Once baked and completely cooled, portion it into individual freezer-safe containers or wrap the entire casserole tightly in plastic wrap and then aluminum foil. It can be frozen for up to 3 months. To reheat, thaw overnight in the refrigerator and then bake at 350°F (175°C) until heated through, or microwave individual portions.

What’s the best way to shred chicken?

After boiling, the chicken breast should be very tender. The easiest way to shred it is using two forks to pull the meat apart. For a quicker method, if you have a stand mixer, you can place the warm chicken breasts in the bowl and, using the paddle attachment on low speed, the chicken will shred in seconds. Be careful not to overmix.

How do I pick a good spaghetti squash?

Look for a spaghetti squash that is firm, heavy for its size, and has a vibrant yellow color. Avoid squashes with soft spots, blemishes, or cracks. A dull rind often indicates ripeness.

Paleo chicken casserole in a plate.
A wholesome and satisfying portion ready to be served.

Other Squash Recipes You’ll Love

If you’ve enjoyed this spaghetti squash casserole, you’ll surely love exploring more recipes featuring the versatile and healthy squash family. Here are a few more delicious ideas to add to your repertoire:

Black Bean Butternut Squash Turkey Chili
Buffalo Chicken Spaghetti Squash Casserole
Squash Au Gratin (Paleo, Gluten-Free)

Did you try this recipe? Please leave us a ⭐ review below!

Rating: 4.67 from 9 votes

Chicken Spaghetti Squash Casserole (Dairy-free, Paleo)

By: Dominique |
Servings: 6 |
Cook Time: 2 hrs |
Total Time: 2 hrs
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A savory and easy spaghetti squash recipe made with a creamy dairy-free sauce.

Chicken Spaghetti Squash Casserole in a plate.

Ingredients

  • 1 medium spaghetti squash
  • 1.5-2 lbs chicken breast
  • 32 ounces chicken broth (to boil chicken in)
  • 1/4 tsp dried thyme
  • 1/4 tsp dried rosemary
  • 1 head of cauliflower
  • 2.5 Tbs minced garlic (or 1.5 tsp garlic powder)
  • 1/2 of a yellow onion, minced (or 1.5 tsp onion powder)
  • 1 Tbs olive oil
  • 1 tsp salt
  • 1/2 tsp pepper (optional – omit for AIP)
  • 1/4 tsp nutmeg (optional – omit for AIP)
  • 1 can coconut cream
  • 3 tsp coconut flour (or 1 Tbs tapioca flour)
  • 1/2 cup crumbled goat cheese (optional – omit for AIP, Paleo, and Whole30)

Instructions

  1. Preheat the oven to 400°F (200°C).
  2. Cover a baking sheet with aluminum foil.
  3. Cut the spaghetti squash in half lengthwise and remove the seeds and stringy core with a spoon. Brush or spray the cut surfaces with olive oil.
  4. Lay the squash halves face down on the aluminum foil. Cook for 30-40 minutes, then remove from the oven and let cool slightly.
  5. While the spaghetti squash is cooking, place the chicken breast and 32 ounces of chicken stock into a large pot and bring to a boil. Add ¼ tsp of dried rosemary and ¼ tsp of dried thyme. Lower to a simmer and cook covered for 30 minutes. Remove the chicken from the chicken stock (reserving 1 cup of liquid) and shred it with two forks. Set the shredded chicken aside.
  6. While the chicken and spaghetti squash are cooking, fill another pan with water and cook the cauliflower (cut into smaller florets) for 11 minutes. Remove from heat and strain. Set the cauliflower aside.
  7. In a large pan, add 1 tablespoon of olive oil. Set the stovetop to medium heat. Place the minced garlic and onions into the pan and mix them into the olive oil. Let them cook for 4 minutes until softened. Add the can of coconut cream to the pan, along with the salt, pepper, and nutmeg. Add the coconut flour (or tapioca flour) and the 1 cup of reserved chicken stock (from boiling the chicken) to the mixture. Allow the mixture to boil for 8-9 minutes, stirring occasionally; it will thicken during this time. Remove the mixture from heat.
  8. Once the spaghetti squash is cool enough, use a fork to rake against the inside, removing the “spaghetti” strands.
  9. Place the shredded chicken, cooked cauliflower, and spaghetti squash strands into the pot with the creamy white sauce and mix everything together thoroughly until well combined.
  10. Pour the entire mixture into a large 13×9 inch baking pan. If using, cover the top evenly with ½ cup of crumbled goat cheese.
  11. Bake in the oven at 400°F (200°C) for 15 minutes. For a golden-brown top, set the oven to broil and bake for an additional 3-5 minutes, watching carefully to prevent burning.
  12. Serve hot and enjoy your delicious casserole!

Notes

  • For added protein and flavor, consider using bone broth instead of regular chicken broth.
  • Tapioca flour can be used as a substitute for coconut flour if preferred, with 1 tablespoon of tapioca flour equivalent to 3 teaspoons of coconut flour.
  • To make this recipe strictly Paleo, Whole30, or completely dairy-free, simply omit the crumbled goat cheese.

Nutrition

Calories: 681 kcal
Carbohydrates: 24 g
Protein: 66 g
Fat: 37 g
Saturated Fat: 24 g
Polyunsaturated Fat: 2 g
Monounsaturated Fat: 6 g
Trans Fat: 0.03 g
Cholesterol: 181 mg
Sodium: 1390 mg
Potassium: 1704 mg
Fiber: 7 g
Sugar: 8 g
Vitamin A: 474 IU
Vitamin C: 56 mg
Calcium: 121 mg
Iron: 4 mg

Nutrition information is automatically calculated and should be used as an approximation.

Additional Info

Course: Main Course
Cuisine: American

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