Low carb chicken spaghetti brings the cozy appeal of a baked casserole to the table without ordinary pasta. Tender spaghetti squash stands in for noodles, while shredded chicken, tomatoes with green chiles, cream cheese, and cheddar make a creamy, gently tangy sauce. The finished dish is hearty enough for a weeknight dinner, easy to portion for meal prep, and especially useful when you have cooked chicken ready to use.
What makes low carb chicken spaghetti different?
Instead of wheat noodles, this casserole uses roasted spaghetti squash. The squash becomes pleasantly strand-like when scraped with a fork, but it keeps a lighter texture that lets the chicken and cheese sauce remain the focus. Diced tomatoes with green chiles add small bursts of acidity and heat, so the rich sauce does not taste flat.
Why this baked casserole works
The sauce is built gently on the stovetop, which gives softened cream cheese time to blend with chicken broth and heavy cream. Shredded cheddar adds savory flavor and helps the casserole brown in the oven. Roasting the squash first also prevents the finished dish from becoming watery and concentrates its mild sweetness.
How to make low carb chicken spaghetti
Plan on about 20 minutes of hands-on preparation and 35 minutes of cooking. Roast the squash until a fork slides through the flesh, then let it cool just enough to handle. If your chicken is not already cooked, poached or rotisserie chicken both work well; shred it into bite-size pieces so every serving has a good balance of filling and sauce.
Ingredients
- 1 large spaghetti squash, halved and seeds removed
- 2 cups cooked shredded chicken
- 1 can diced tomatoes with green chiles
- 4 ounces softened cream cheese
- 1 cup shredded cheddar cheese, divided
- 1/2 cup chicken broth
- 1/2 cup heavy cream
- 1/2 teaspoon garlic powder
- 1/2 teaspoon onion powder
- 1/4 teaspoon salt
- 1/4 teaspoon black pepper
Method
- Roast the spaghetti squash cut side down at 400°F until tender, about 35 minutes, then scrape the strands into a bowl.
- Stir the cream cheese, chicken broth, heavy cream, garlic powder, onion powder, salt, and black pepper together in a saucepan over low heat until smooth.
- Fold the spaghetti squash strands, shredded chicken, and diced tomatoes with green chiles into the sauce.
- Transfer the mixture to a baking dish, top with half of the cheddar cheese, and bake at 350°F until hot and bubbling, about 20 minutes.
- Sprinkle with the remaining cheddar cheese and return to the oven until the cheese melts, then serve warm.
Serving ideas
Serve low carb chicken spaghetti in shallow bowls while the cheese is still glossy. A crisp green salad, steamed broccoli, or roasted green beans gives the creamy casserole a fresh contrast. For a family dinner, put the baking dish on the table with extra black pepper and a simple vegetable side.
The casserole is also a useful way to turn a small amount of leftover chicken into a complete meal. Because the squash, sauce, and chicken are mixed together before baking, every scoop carries both protein and vegetables. Cut the portions after the dish has rested for five minutes; that brief pause helps the creamy filling settle instead of spreading across the plate.
Tips for the best texture
Let roasted squash drain briefly if it releases a lot of moisture. Use room-temperature cream cheese when possible because it melts into the broth more smoothly. Do not boil the sauce aggressively; low heat keeps it creamy. Shred cheddar from a block for the most even melt.
Optional variation: For an optional variation, add a pinch of smoked paprika or a few sliced jalapeños to the sauce. Keep the main recipe amounts the same so the casserole remains balanced.
Storage and reheating
Cool leftovers promptly and store them covered in the refrigerator for up to three days. Reheat individual portions in the microwave in short intervals, stirring once if practical, or warm the casserole covered in a 325°F oven. If the sauce thickens, add a small splash of chicken broth before reheating.
For meal planning, divide the cooled casserole into shallow containers so it chills evenly. Keep the cheddar topping covered and add a little fresh cheese when reheating if you want a newly melted finish. Avoid overheating, since spaghetti squash can release moisture and the cream sauce may separate when it is very hot.
Low carb chicken spaghetti questions
Can I use leftover chicken?
Yes. Cooked chicken breast or thigh works well as long as it is shredded and mild enough to pair with the creamy sauce.
Can I prepare the casserole ahead?
Assemble it, cover it, and refrigerate it for a short make-ahead window. Add a few minutes to the covered baking time so the center heats through.
How do I keep spaghetti squash from becoming watery?
Roast it cut side down, let it steam off briefly, and drain excess liquid before mixing it into the sauce.
FAQ: Frequently asked questions
A cozy squash-based dinner
This low carb chicken spaghetti is a practical casserole with familiar comfort-food flavor and a lighter noodle substitute. Roast the squash until tender, keep the sauce gentle, and finish with plenty of bubbling cheddar for a warm dinner that is simple to serve and easy to save for another meal.
Low Carb Chicken Spaghetti with Spaghetti Squash
Ingredients
Ingredients
- 1 large spaghetti squash halved and seeds removed
- 2 cups cooked chicken shredded
- 1 can diced tomatoes with green chiles undrained
- 4 ounces cream cheese softened
- 1 cup shredded cheddar cheese divided
- 1/2 cup chicken broth
- 1/2 cup heavy cream
- 1/2 teaspoon garlic powder
- 1/2 teaspoon onion powder
- 1/4 teaspoon salt
- 1/4 teaspoon black pepper
Instructions
Instructions
- Roast the spaghetti squash cut side down at 400°F until tender, about 35 minutes, then scrape the strands into a bowl.
- Stir the cream cheese, chicken broth, heavy cream, garlic powder, onion powder, salt, and black pepper together in a saucepan over low heat until smooth.
- Fold the spaghetti squash strands, shredded chicken, and diced tomatoes with green chiles into the sauce.
- Transfer the mixture to a baking dish, top with half of the cheddar cheese, and bake at 350°F until hot and bubbling, about 20 minutes.
- Sprinkle with the remaining cheddar cheese and return to the oven until the cheese melts, then serve warm.
