This low-carb casserole combines spicy buffalo sauce with tender shredded chicken and nutrient-dense spaghetti squash. It is a gluten-free dinner option that is quick to assemble and satisfyingly hearty.

List of ingredients
- 3 cups spaghetti squash, shredded (approximately one medium squash) – provides a pasta-like base.
- 2.5 cups shredded chicken (1 lb) – the primary protein source.
- 1/2 tablespoon olive oil – adds moisture and richness.
- 1 egg – acts as a binder for the casserole.
- 1/2 teaspoon onion powder – adds savory depth.
- 1/4 teaspoon black pepper – provides a subtle heat.
- 1/2 teaspoon garlic powder – enhances the savory profile.
- 1/3 cup Frank’s Red Hot – provides the signature buffalo flavor.
- 1/2 cup blue cheese crumbles (optional) – adds a sharp, creamy finish.
step-by-step instructions
- Prep the oven: Preheat your oven to 400 degrees Fahrenheit.
- Cook the squash: For the microwave method, fill a microwave-safe glass dish with one inch of water. Slice the squash in half, place it face down in the water, and microwave on high for 10 minutes. For the Instant Pot method, slice the squash, place it in the pot with one cup of water, seal, and cook for 5 minutes. Manually release the pressure and shred the cooked squash with a fork.
- Prepare the chicken: Shred your chicken using a preferred method. You can use an Instant Pot, a crockpot, boil it on the stove for 10 minutes, or use a pre-cooked rotisserie chicken.
- Mix the sauce: In a medium bowl, combine the olive oil, egg, onion powder, black pepper, garlic powder, and Frank’s Red Hot. Whisk the ingredients until they are fully combined.
- Combine ingredients: Add the cooked shredded spaghetti squash and shredded chicken to a large bowl. Pour in the spice and sauce mixture and stir until everything is evenly coated. Fold in the blue cheese crumbles if using.
- Bake the casserole: Pour the mixture into a greased 8×8 inch baking dish. Bake at 400 degrees for 25 minutes or until the top begins to brown. You may broil for one minute at the end to achieve a crispy top.
Squash Preparation Methods
Microwave Cooking for Speed
Using a microwave is the fastest way to prepare spaghetti squash for this bake. The shallow water bath creates steam that softens the flesh quickly without drying it out. This method is ideal for those needing a quick weeknight meal.
Instant Pot Pressure Cooking
The Instant Pot ensures the squash is cooked evenly and remains moist. By using the sealing function for five minutes and then performing a quick release, you maintain the structural integrity of the strands. This is a great option for cooking larger squash.
Traditional Oven Roasting
While not mentioned in the primary steps, you can roast squash at 400 degrees for 40-50 minutes. Slice the squash in half and brush with oil before roasting face down. This method provides a slightly deeper flavor through caramelization.
Chicken Preparation Options
Using Rotisserie Chicken
A store-bought rotisserie chicken is the most efficient way to get shredded chicken. Simply remove the skin and bones and shred the breast and thigh meat with two forks. This reduces the active prep time to just a few minutes.
Instant Pot Shredded Chicken
Cooking chicken breasts in an Instant Pot with a small amount of broth ensures the meat stays juicy. Once cooked, the chicken can be shredded easily within the pot using a hand mixer. This method is excellent for preparing large batches of protein.
Crockpot Slow Cooking
Slow cooking chicken on low for 6-8 hours results in meat that falls apart naturally. This is the best method for those who prefer to prep their ingredients the night before. Ensure the chicken is submerged in a bit of liquid to prevent dryness.
Stove-top Boiling
Boiling chicken breasts in water or vegetable broth for about 10-15 minutes is a reliable basic method. Once the internal temperature reaches 165 degrees, remove the chicken and shred it immediately. This is a fast option if you do not own a pressure cooker.
Flavor Customization and Substitutions
Adjusting the Heat Level
You can control the spiciness by varying the amount of Frank’s Red Hot. For a milder taste, reduce the sauce to 1/4 cup. For extra heat, add a pinch of cayenne pepper or a few drops of a habanero-based hot sauce.
Alternative Cheese Options
If you prefer a different flavor profile, replace blue cheese with sharp cheddar or mozzarella. Goat cheese provides a creamy, tangy alternative that pairs well with buffalo sauce. Omit cheese entirely to make the dish paleo or Whole30 compliant.
Adding Crunchy Vegetables
Finely diced celery and carrots can be stirred into the mixture before baking. These vegetables are traditional pairings for buffalo wings and add a refreshing crunch. Diced bell peppers also add sweetness and vibrant color to the bake.
Fresh Herb Garnishes
Adding chopped green onions or fresh parsley after baking elevates the presentation. These herbs provide a bright, fresh contrast to the rich, spicy flavors of the sauce. Cilantro is another bold option for those who enjoy it.
Serving Suggestions
Pairing with Fresh Celery
Serve the bake alongside chilled celery sticks to mimic the traditional wing experience. The cool, watery crunch of the celery helps balance the intensity of the buffalo sauce. You can serve them raw or lightly blanched.
Adding a Cooling Dip
A side of ranch or blue cheese dressing is a classic accompaniment for this dish. Drizzling the dressing over the top of each serving adds a creamy layer that tempers the heat. This makes the meal more satisfying for those who dislike extreme spice.
Complementary Side Salads
A crisp garden salad with a light vinaigrette cleanses the palate between bites. Mixed greens, cucumbers, and cherry tomatoes provide a refreshing contrast. Avoid heavy creamy salads to keep the meal low-carb and light.
Roasted Vegetable Pairings
Roasted broccoli or cauliflower florets make an excellent side dish. Toss them in olive oil and salt, then roast them at the same temperature as the casserole. This adds more volume to the meal without increasing the carb count.
Storage and Preservation
Refrigerator Storage Guidelines
Store leftovers in an airtight glass or plastic container in the refrigerator. The bake will stay fresh and flavorful for 3 to 4 days. Ensure the container is sealed tightly to prevent the squash from absorbing other fridge odors.
Freezing the Casserole
You can freeze the baked casserole for up to two months. Allow the dish to cool completely before slicing into portions and wrapping them in foil. Place the wrapped portions in a heavy-duty freezer bag to prevent freezer burn.
Thawing Process
For best results, thaw the casserole in the refrigerator overnight. This prevents the edges from drying out during the reheating process. Avoid thawing at room temperature to maintain food safety standards.
Reheating Techniques
Oven Reheating for Texture
Preheat the oven to 350 degrees Fahrenheit and place the leftovers in an oven-safe dish. Cover with foil to retain moisture and heat until the center is hot. This method preserves the texture of the chicken and squash best.
Microwave Reheating for Speed
Place a portion of the bake on a microwave-safe plate and cover it with a damp paper towel. Heat in 30-second intervals, stirring gently in between. The damp towel prevents the chicken from becoming rubbery.
Air Fryer Reheating
An air fryer can be used to bring back the crispiness of the top layer. Heat at 320 degrees for 3-5 minutes until warmed through. This is the best way to restore the browned cheese effect.
Make-Ahead Strategies
Pre-assembling the Dish
You can mix all the ingredients and place them in the baking dish a day in advance. Cover the dish tightly with plastic wrap and store it in the refrigerator. When ready to eat, remove the wrap and bake as directed.
Advance Ingredient Preparation
Cook and shred the spaghetti squash and chicken during your weekly meal prep. Store them in separate containers until you are ready to assemble the casserole. This reduces the final preparation time to under ten minutes.
Troubleshooting Common Issues
Preventing Watery Casseroles
Spaghetti squash can hold a significant amount of water, which may make the bake soggy. After shredding the squash, press it against a colander or squeeze it with a clean kitchen towel. Removing excess moisture ensures the sauce thickens properly.
Fixing Dry Chicken Texture
If the shredded chicken feels too dry, add an extra tablespoon of olive oil or a splash of vegetable broth. Ensure the chicken is folded in gently so it doesn’t break down too much. Using thigh meat instead of breast can also increase moisture.
Avoiding Over-browned Tops
If the top of the casserole browns too quickly before the center is hot, cover it with aluminum foil. This traps the heat inside while shielding the surface from direct oven heat. Remove the foil for the last five minutes to regain the color.
Frequently Asked Questions
Can I make this recipe dairy-free?
Yes, simply omit the blue cheese crumbles. The flavor remains bold and spicy due to the buffalo sauce and spices. You can substitute the cheese with a plant-based alternative if desired.
What is the best type of squash to use?
Medium-sized spaghetti squash are generally the best because they have a balanced seed cavity to flesh ratio. Look for squash with a firm skin and a heavy feel for its size. Avoid overly large squash as they can sometimes be more watery.
Why is an egg included in the recipe?
The egg acts as a structural binder that holds the shredded squash and chicken together. Without the egg, the casserole would be more like a loose stir-fry. It creates the cohesive, sliceable texture characteristic of a bake.
Print
Buffalo Chicken Spaghetti Squash Bake
- Total Time: 35 minutes
- Yield: 4 servings 1x
- Diet: Low Carb, Gluten Free
Description
This Healthy Buffalo Chicken Spaghetti Squash Casserole is the perfect quick weeknight dinner. Low in carbs, but full on flavor – it’s gluten free and SO delicious!
Ingredients
- 3 cups shredded spaghetti squash
- 2.5 cups shredded chicken
- 1/2 tablespoon olive oil
- 1 egg
- 1/2 teaspoon onion powder
- 1/4 teaspoon black pepper
- 1/2 teaspoon garlic powder
- 1/3 cup Frank’s Red Hot
- 1/2 cup blue cheese crumbles (optional)
Instructions
- Preheat: Preheat oven to 400 degrees
- Cook Squash: Cook spaghetti squash. For microwave: Fill a microwave safe glass dish with 1 inch of water. Slice spaghetti squash in half + place face down in water. Microwave on high for 10 minutes until cooked. Remove from microwave + shred spaghetti squash. For instant pot: Slice spaghetti squash, put in your instant pot with 1 cup of water. Cover + set pot to sealing for 5 minutes. Manually release the pressure + shred your cooked squash with a fork!
- Prepare Chicken: While spaghetti squash is cooking, make shredded chicken. You can make instant pot shredded chicken, crockpot shredded chicken, boil on the stove for 10 minutes, or buy a rotisserie chicken + shred.
- Mix Sauce: In a bowl, mix together olive oil, egg, spices+ Frank’s Red Hot. Whisk until combined.
- Combine: Add cooked spaghetti squash, shredded chicken + spice/sauce mixture to a bowl and stir until combined. Stir in blue cheese crumbles.
- Bake: Pour mixture in a greased 8×8 baking dish. Bake at 400 for 25 minutes or until top starts to brown. You can broil for one minute to get a crispy top.
Notes
Easily made paleo or whole30 by leaving off the cheese. Can be assembled ahead of time and kept in the refrigerator until ready to bake.
- Prep Time: 15 minutes
- Cook Time: 20 minutes
- Category: Main Course
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1.5 cups
- Calories: 217 kcal
- Sugar: 2 g
- Sodium: 450 mg
- Fat: 10 g
- Saturated Fat: 4 g
- Unsaturated Fat: 6 g
- Trans Fat: 0 g
- Carbohydrates: 5 g
- Fiber: 1 g
- Protein: 25 g
- Cholesterol: 114 mg
Keywords: buffalo chicken, spaghetti squash, low carb, gluten free, casserole




