This Creamy Chicken & Broccoli Alfredo Spaghetti Squash Casserole brings all the comfort of a rich, cheesy pasta bake—without the carbs. It’s a low-carb, high-protein dish that fits beautifully into Whole30, Keto, and Paleo meal plans. The creamy Alfredo-style sauce coats tender shreds of spaghetti squash and juicy chicken, while bright broccoli adds a pop of color and nutrition. It’s the kind of cozy, wholesome dinner you can feel good about serving your family. In this guide, you’ll discover the story behind the recipe, ingredients list, helpful cooking tips, and answers to the most common casserole questions.
A Family Favorite With a Healthy Twist
Like many comforting meals, this Creamy Chicken & Broccoli Alfredo Spaghetti Squash Casserole began as a family favorite born out of busy weeknights and a craving for something cozy. The original version was a classic creamy chicken casserole—laden with pasta, heavy cream, and cheese. The taste was incredible, but after a while, I began looking for a way to recreate that same indulgent flavor without the carb overload. That’s when spaghetti squash became the secret ingredient that changed everything.
The first time I roasted a golden squash and fluffed out the strands with a fork, I couldn’t believe how perfectly it mimicked pasta. When combined with shredded chicken, steamed broccoli, and a luscious homemade Alfredo sauce, it transformed into a dish that filled the kitchen with garlicky, savory aromas. My family gathered around the table, skeptical at first, but after the first bite, they cleaned their plates. The “Low Carb Chicken Casserole With Spaghetti Squash” quickly became part of our weekly dinner rotation—a guilt-free comfort food that perfectly fits a “Whole 30 Chicken Spaghetti” lifestyle without compromising on flavor or heartiness.
What makes this casserole special isn’t just its creamy texture—it’s how effortlessly it adapts to any healthy eating approach. For those following Keto, it’s rich in protein and healthy fats with minimal carbs. Paleo fans can swap dairy for coconut cream or cashew-based alternatives, keeping the same indulgent flavor. And Whole30 followers can enjoy it completely dairy-free without losing its satisfying creaminess.
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Creamy Chicken & Broccoli Alfredo Spaghetti Squash Casserole
- Total Time: 1 hour 20 minutes
- Yield: 8 servings 1x
Description
This creamy Chicken & Broccoli Alfredo Spaghetti Squash Casserole combines tender chicken, roasted spaghetti squash, and fresh broccoli in a rich Alfredo sauce for a low carb family dinner. It fits Keto, Paleo, and Whole30 diets without sacrificing flavor.
Ingredients
Instructions
1. Preheat oven to 400°F and line a baking sheet with parchment paper
2. Place spaghetti squash halves cut side down on the sheet and roast until tender, about 35–40 minutes
3. Allow squash to cool slightly, then scrape strands into a bowl and drain on paper towels
4. Heat olive oil in a skillet over medium heat and sauté onion and garlic until fragrant
5. Pour in heavy cream and chicken broth and bring to a gentle simmer
6. Add cream cheese, Parmesan, Italian seasoning, salt, and pepper and whisk until smooth
7. Stir shredded chicken and broccoli into the sauce until well coated
8. Transfer mixture to a greased 9×13-inch baking dish and smooth the top
9. Sprinkle mozzarella evenly over the casserole
10. Bake uncovered at 375°F until golden and bubbly, about 20–25 minutes
11. Let rest for 5–10 minutes before serving
- Prep Time: 20 minutes
- Cook Time: 1 hour
- Category: casserole
- Method: bake
- Cuisine: american
Nutrition
- Serving Size: 1 1/2 cups
- Calories: 320
- Sugar: 4
- Sodium: 450
- Fat: 20
- Saturated Fat: 10
- Unsaturated Fat: 7
- Trans Fat: 0
- Carbohydrates: 12
- Fiber: 3
- Protein: 25
- Cholesterol: 75
Keywords: low carb, keto, whole30, paleo, spaghetti squash, chicken casserole, alfredo, broccoli, healthy dinner
With balanced components—lean chicken for protein, broccoli for fiber and color, and spaghetti squash for that noodle-like base—it’s the definition of a “Healthy Dinner.” Whether you’re searching for “Paleo Chicken Spaghetti Squash” or “Keto Recipes Dinner,” this casserole fits right in, offering nourishment, comfort, and versatility for every plate.
Ingredients and Kitchen Prep for the Perfect Low Carb Chicken Casserole With Spaghetti Squash
Simple Ingredients That Build Flavor
Every great Low Carb Chicken Casserole With Spaghetti Squash starts with wholesome, simple ingredients that deliver comfort and nutrition in every bite. Here’s a complete list of what you’ll need to create this Creamy Chicken Spaghetti Squash Bake.
| Ingredient | Amount | Notes/Substitutions |
|---|---|---|
| Spaghetti squash | 1 large (about 3–4 lbs) | Roasted or microwaved, then shredded |
| Cooked chicken breast | 3 cups, shredded | Use rotisserie, grilled, or leftover chicken |
| Broccoli florets | 2 cups, lightly steamed | Substitute with cauliflower if preferred |
| Olive oil | 1 tbsp | Avocado oil also works well |
| Garlic | 3 cloves, minced | Use fresh for stronger flavor |
| Onion | ½ cup, finely diced | Optional but adds depth |
| Heavy cream | 1 cup | Use coconut or cashew cream for Paleo/Whole30 |
| Cream cheese | 4 oz | Dairy-free alternative if needed |
| Parmesan cheese | ½ cup, grated | Nutritional yeast for dairy-free version |
| Mozzarella cheese | 1 cup, shredded | Optional topping for extra creaminess |
| Salt & pepper | To taste | Adjust as preferred |
| Italian seasoning | 1 tsp | Adds a savory, herby note |
| Chicken broth | ½ cup | Helps thin the sauce if needed |
This balance of lean protein, crisp broccoli, and a creamy sauce creates that indulgent Sunday dinner flavor without feeling heavy. For a Vegan or dairy-free spin, replace chicken with chickpeas and use a blended cashew Alfredo base. Whether it’s your new favorite Low Carb Chicken Casserole With Spaghetti Squash or Creamy Chicken Spaghetti Squash Bake, these ingredients guarantee flavor in every forkful.
Tools You’ll Need to Make It Easy
- Baking dish (9×13 inches): Ensures even baking.
- Sharp knife & sturdy cutting board: Safely slice the squash.
- Large skillet or saucepan: Prepare the sauce here.
- Mixing bowl: For combining ingredients.
- Fork: To shred cooked squash strands.
- Tongs or spatula: For transferring the mixture.
Prep Tips: Roast squash ahead of time and refrigerate the shreds; use precooked chicken to save time; lightly steam broccoli to keep texture and color. Careful prep ensures your Low Carb Chicken Casserole With Spaghetti Squash comes out creamy, balanced, and ready to impress.
Step-by-Step Cooking Method for Creamy Chicken & Broccoli Alfredo Spaghetti Squash Casserole
Step-by-Step Preparation Process
- Roast the Spaghetti Squash: Preheat oven to 400°F (200°C). Slice in half, scoop out seeds, drizzle with oil, salt, and pepper. Roast cut-side down on parchment for 35–40 minutes. Shred with fork and drain on paper towels to remove moisture.
- Prepare the Sauce: Heat oil over medium heat, sauté onion and garlic. Stir in heavy cream or coconut cream and whisk in cream cheese until smooth. Add Parmesan, salt, pepper, and Italian herbs; simmer to thicken. For Whole30 Chicken Spaghetti, use a blended cashew or coconut cream base.
- Combine the Ingredients: In a large bowl, mix shredded chicken, squash strands, and steamed broccoli. Pour sauce over and toss gently to coat evenly.
- Assemble the Casserole: Pour mixture into a greased 9×13-inch dish, top with mozzarella if desired, and bake uncovered at 375°F (190°C) for 20–25 minutes until golden and bubbling.
- Serve and Enjoy: Let rest 5–10 minutes before serving. Garnish with parsley and Parmesan.
This easy process turns simple ingredients into a wholesome, low-carb masterpiece that feels as comforting as any pasta casserole—rich, flavorful, and family-approved.
Tips for Perfect Texture and Flavor Balance
- Prevent soggy squash: Drain strands after roasting for a sauce that clings beautifully.
- Cheese timing matters: Add mozzarella near the end for perfect meltiness.
- Juicy chicken: Use rotisserie or gently cooked chicken to avoid dryness.
- Creative add-ins: Mix in bacon, mushrooms, or sun-dried tomatoes for variety.
- Meal prep smart: Store portions for easy Keto Recipes Dinner or weekday meals.
- Storage: Refrigerate up to 4 days or freeze for future Healthy Low Carb Chicken Dinner Ideas.
These practical tips ensure your Creamy Chicken & Broccoli Alfredo Spaghetti Squash Casserole offers the perfect balance of tenderness, richness, and homestyle comfort every time.
FAQs
Can I make this Creamy Chicken & Broccoli Alfredo Spaghetti Squash Casserole ahead of time?
Yes. Prepare the casserole up to the baking step, cover, and refrigerate for 24 hours. Bake as directed, adding roughly 10 extra minutes if cold. Ideal for busy family nights or easy meal-prep Healthy Dinners.
What can I use instead of heavy cream for a Paleo version?
Use full-fat coconut cream for smooth texture or blended soaked cashews with broth for a nutty flavor. These swaps deliver the same creamy consistency while keeping it Paleo- and Whole30-friendly.
How do I store and reheat leftovers?
Keep leftovers in airtight containers for up to four days. Reheat individual portions in the microwave or bake gently until warm. Flavors improve with time, making it great for Keto Recipes Dinner planning.
Can I freeze this casserole?
Yes. Cool before wrapping tightly in plastic and foil; freeze up to two months. Thaw overnight and reheat until bubbly. Perfect for a Healthy Low Carb Chicken Dinner Idea when you need comfort food fast.
What’s the best chicken to use?
Rotisserie chicken gives convenience and flavor, but baked or poached chicken breast works well too. Keep it moist to preserve tenderness in every creamy bite of your casserole.
Conclusion
This Creamy Chicken & Broccoli Alfredo Spaghetti Squash Casserole captures the feeling of indulgent comfort food while staying light, nourishing, and low-carb. Each creamy forkful delivers balanced richness from the sauce, freshness from broccoli, and satisfying texture from spaghetti squash strands.
Whether feeding a family or meal-prepping lunches for the week, this wholesome casserole brings both flavor and simplicity to your table. Gather your loved ones, savor the aroma, and enjoy a Healthy Dinner that warms the soul as much as it delights the appetite.
