This Chicken Spaghetti Bake is a cozy dish made with tender chicken, spaghetti, and creamy sauce. It bakes up bubbly and golden, making your kitchen smell wonderful!
If you’re like me, you’ll love how easy it is to throw together. Plus, it’s a hit with the family—everyone always goes back for seconds! 🍽️
Key Ingredients & Substitutions
Spaghetti: A classic choice, spaghetti holds the sauce well. If you’re looking for a gluten-free option, try gluten-free pasta or even zucchini noodles for a lighter dish.
Chicken: I love using boneless, skinless chicken breasts for easy prep. You can substitute rotisserie chicken for convenience or even use shredded turkey if you have leftovers!
Bell Peppers: Red bell peppers bring sweetness and color. Green peppers work too, but if you want extra sweetness, try yellow or orange bell peppers.
Sour Cream & Mayonnaise: Together, they create a creamy sauce. For a lighter option, use Greek yogurt instead of sour cream or try a dairy-free mayo if needed.
Cheese: Cheddar and mozzarella offer great flavor and meltiness. Feel free to swap in pepper jack for some heat or goat cheese for a tangy twist.
How Do I Cook Chicken Perfectly for My Bake?
Cooking the chicken just right is key to a flavorful Chicken Spaghetti Bake. Follow these steps:
- Ensure your skillet is hot enough with olive oil before adding the chicken. This prevents sticking.
- Season well with salt and pepper on both sides; this adds flavor from the inside out.
- Cook for about 5-7 minutes per side, depending on thickness, until the chicken reaches an internal temperature of 165°F (75°C).
- Let it rest for a few minutes after cooking before slicing. This helps keep it juicy!

Chicken Spaghetti Bake
Ingredients You’ll Need:
- 12 oz spaghetti
- 2 tablespoons olive oil
- 1.5 pounds boneless, skinless chicken breasts
- Salt and black pepper to taste
- 1 cup diced red bell pepper (about 1 medium pepper)
- 1 cup diced tomatoes (canned or fresh)
- 1 cup sour cream
- 1 cup mayonnaise
- 1 cup shredded cheddar cheese, divided
- 1 cup shredded mozzarella cheese, divided
- 1/2 cup grated Parmesan cheese
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
- 2 tablespoons fresh parsley, chopped (for garnish)
How Much Time Will You Need?
The total time for this Chicken Spaghetti Bake will be about 50 minutes—10-15 minutes for prep and 25-30 minutes for baking. It’s a quick way to get a hearty dish on the table!
Step-by-Step Instructions:
1. Preheat the Oven:
Set your oven to 350°F (175°C) so it’s ready to bake your casserole after preparation. This will help ensure even cooking.
2. Cook the Spaghetti:
In a large pot, bring salted water to a boil. Add the spaghetti and cook according to the package instructions until it’s al dente (firm to the bite). Once cooked, drain the spaghetti and set it aside.
3. Prepare the Chicken:
While the spaghetti is cooking, heat the olive oil in a large skillet over medium heat. Season the chicken breasts with salt and black pepper. Cook them for about 5-7 minutes per side until they’re golden brown and no longer pink inside. When done, take them out of the skillet and let them rest for a few minutes before slicing or shredding into bite-sized pieces.
4. Make the Creamy Sauce:
In a large mixing bowl, combine the sour cream, mayonnaise, garlic powder, onion powder, and half of the shredded cheddar, mozzarella, and Parmesan cheeses. Stir the mixture until smooth and well combined.
5. Combine Ingredients:
Now, add the cooked spaghetti, sliced or shredded chicken, diced red bell pepper, and diced tomatoes into the bowl. Mix everything well until it’s all coated in the creamy sauce.
6. Assemble the Casserole:
Transfer the spaghetti mixture into a greased 9×13 inch casserole dish. Spread it evenly. Top it with the remaining cheeses for a delicious, cheesy crust.
7. Bake It:
Place the casserole dish in the preheated oven and bake uncovered for 25-30 minutes. You’ll know it’s ready when the cheese is melted, bubbly, and lightly golden on top.
8. Serve and Enjoy:
Take the dish out of the oven and let it cool for a few minutes. Before serving, sprinkle freshly chopped parsley on top for a burst of color and flavor. Enjoy your warm and comforting Chicken Spaghetti Bake!
Can I Use Whole Wheat or Gluten-Free Pasta?
Absolutely! You can use whole wheat spaghetti for a healthier option, or gluten-free spaghetti if you have dietary restrictions. Just make sure to follow the cooking instructions on the package, as different types may require different cooking times.
How Do I Store Leftovers?
Leftovers can be stored in an airtight container in the fridge for up to 3 days. To reheat, simply warm in the microwave or oven until heated through. You might want to add a splash of milk or broth to keep the sauce creamy while reheating.
Can I Add Different Vegetables to This Dish?
Definitely! Feel free to include other vegetables like spinach, mushrooms, or broccoli. Just make sure to chop them small and consider sautéing them briefly in the skillet before adding to the mixture for softness and flavor.
Is It Possible to Make This Bake Vegetarian?
Yes, you can easily make this dish vegetarian by substituting the chicken with cooked beans or lentils. You can also add more vegetables to keep it hearty and filling. Just ensure you have enough flavorful ingredients in the creamy sauce!
