Baked Chicken Spaghetti
- Kim
- Feb 12, 2023
- 3 min read
Updated: Mar 22
Looking for a great chicken spaghetti recipe? This cheesy pasta dish combines cooked chicken, a rich sauce, and green peppers for a flavorful, satisfying meal that’s easy to make any night of the week.

Baked Chicken Spaghetti is the ultimate comfort food and a great option for a busy weeknight. This easy chicken spaghetti recipe combines tender chicken, spaghetti noodles, and a delicious sauce baked to perfection in a casserole dish. It’s a cheesy chicken spaghetti the whole family will love.
​
This great recipe has been a favorite of mine since 2002, when a coworker brought it for lunch. It smelled so amazing I had to ask for the recipe. Whether you use leftover chicken, rotisserie chicken, or cooked chicken from boneless skinless chicken breasts, it’s a simple, homemade chicken spaghetti that comes together quickly. I had this creamy chicken spaghetti ready from start to finish in under 40 minutes.
What You Need
Onion, chopped
Bell Pepper, chopped
Celery, chopped
Olive Oil
Boiling Water
Chicken Gravy Mix
Mushrooms, drained (optional)
Rotel Tomatoes, drained
Shredded Cheddar Cheese
Chicken, cooked and diced
Spaghetti, cooked
Tips for Baked Chicken Spaghetti
Cook spaghetti noodles until al dente to prevent them from getting mushy after baking
Use rotisserie chicken or leftover cooked chicken to save time
Cut vegetables evenly so they cook at the same rate
Let the casserole sit for a few minutes after baking so the sauce can set
Cover with aluminum foil if the top starts to brown too quickly
Use mild or original Rotel tomatoes depending on your preferred spice level
More Delicious Dinners
How To Make Baked Chicken Spaghetti
Step 1: Preheat oven to 400°F and prepare a baking dish with non-stick spray. Chop 1/4 cup onion, 1/4 cup celery, and 1/4 cup bell peppers (or green pepper). In a skillet over medium-high heat, sauté onion and vegetables in 2 teaspoons olive oil until tender.

Step 2: In a large pot, bring water to a rolling boil and cook spaghetti noodles according to package directions until al dente. Drain the cooked pasta and set aside.
Step 3: In a small bowl, dissolve 1 package of chicken gravy mix in 1 cup of boiling water or chicken broth (chicken stock). Add to the sautéed vegetables and stir well. Mix in 1 can of drained Rotel tomatoes with green chilies, and optional jar of drained mushrooms (I did not include mushrooms). Stir until a creamy sauce forms. Add the cooked spaghetti and tender cooked chicken, mixing until fully combined.
Above Left: Vegetables, gravy mix and Rotel tomatoes. Above Middle: Cooked chicken added. Above Right: Cooked spaghetti added.
Step 4: Transfer the mixture to the prepared casserole dish, spreading evenly to the top of the casserole. Top with 1 cup shredded cheddar cheese. Bake in the preheated oven for 20-25 minutes, or until hot and bubbly. Serve with garlic bread and green beans or a side salad for a complete meal.
Above Left: Mixture moved to prepared pan and topped with cheese. Above Right: Baked Chicken Spaghetti ready to serve.
How to Store Baked Chicken Spaghetti
Store leftovers in an airtight container in the refrigerator for 3–4 days. This chicken spaghetti casserole reheats well, making it perfect for lunch the next day.

This is a great dish for your weekly rotation and one of those spaghetti recipes you’ll come back to again and again. This cheesy pasta dish is a true family favorite because it is simple, satisfying, and full of flavor. It's Forkin' Good!
Click the below button to take you to the full recipe card (or for a printable recipe card) that includes nutritional information.Â
Be sure to follow me on Facebook & Instagram so you never miss a post! Â If you make this recipe, I would love to hear from you! Â Leave a comment at the bottom of this page! THANK YOU!


















