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Cheesy Chicken Spaghetti is a family comfort food favorite! This recipe uses a from-scratch sauce that is super easy to make so that your delicious cheesy casserole is ready for the oven in just 15 minutes.

a red and white baking dish filled with cheesy chicken spaghetti

We can’t get enough of this cheesy twist on a classic recipe. Is anyone else over spaghetti with tomato sauce and meatballs? Sure, it’s a classic and we love the classics, but after the 2,393,984th time, we’re ready for something different. And boy is this different in all of the right ways!

We love dishes that are easily customizable, and cheesy chicken spaghetti is no exception. Prefer shredded chicken? Go for it! Want a little kick of spice? Replace the diced green chilis with diced jalapeños. You really can make this recipe your own by changing it to suit your own personal preferences. 

  • Can I make cheesy chicken spaghetti vegetarian? 

    You can easily make this dish vegetarian by leaving out the chicken. If you want to make sure it is filling enough as the main meal, add an 8oz container of sliced and sautéd crimini or white button mushrooms. 

  • Cheese Options:

    Instead of cheddar cheese, mix things up with Monterey jack, mozzarella, pepper jack, or a Mexican cheese blend.  

  • Storage and reheating instructions: 

    Store any leftovers in the fridge in an airtight container for up to 4 days. Reheat on the stovetop in a large skillet, adding a few tablespoons of water as needed to thin out the sauce. 

A forkful of cheesy chicken spaghetti hovering over its plate

If you like this recipe, you may be interested in these other delicious pasta recipes:

Watch the video below where Rachel will walk you through every step of this recipe. Sometimes it helps to have a visual, and we’ve always got you covered with our cooking show. You can find the complete collection of recipes on YouTube, Facebook Watch, or our Facebook Page, or right here on our website with their corresponding recipes.

A forkful of cheesy chicken spaghetti hovering over its plate
Cheesy Chicken Spaghetti is a family comfort food favorite! This recipe uses a from-scratch sauce that is super easy to make so that your delicious cheesy casserole is ready for the oven in just 15 minutes.
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Ingredients
  • 8 ounces spaghetti
  • 2 tablespoons butter
  • 1 medium white onion diced
  • 1 green bell pepper diced
  • 2 cloves garlic minced
  • 1/4 cup all-purpose flour
  • 2 cups milk
  • 3 cups shredded cheddar cheese divided
  • 15 ounces canned diced tomatoes drained
  • 4 ounces canned diced green chiles drained
  • 2 cups cooked diced chicken
  • 1/2 teaspoon salt
  • 1/2 teaspoon black pepper
Instructions
  • Preheat oven to 350 degrees. Cook spaghetti in a saucepan according to package directions.
  • Meanwhile, melt butter in a large pot over medium-high heat. Add in onion and bell pepper and cook until softened, about 5-7 minutes.
  • Add in garlic and flour and continue to cook 2 more minutes. Slowly stir in milk and bring to a simmer until thickened. Once the sauce thickens, immediately remove from heat.
  • Stir in 2 cups cheddar cheese until melted and smooth. Then stir in diced tomatoes, diced green chilis, diced cooked chicken, and drained spaghetti. Season with salt and pepper to taste.
  • Pour pasta into a lightly greased 9x13 pan. Top with remaining 1 cup cheddar cheese. Bake in the preheated oven for 25 to 30 minutes until cheese is warm and bubbly and starting to brown.
Notes
Instead of cheddar cheese, mix things up with Monterey jack, mozzarella, pepper jack, or a Mexican cheese blend. 

Nutrition

Calories: 556kcal | Carbohydrates: 44g | Protein: 28g | Fat: 30g | Saturated Fat: 17g | Cholesterol: 95mg | Sodium: 870mg | Potassium: 497mg | Fiber: 3g | Sugar: 8g | Vitamin A: 1056IU | Vitamin C: 31mg | Calcium: 592mg | Iron: 2mg
Course: Main Dish
Cuisine: American
Keyword: Chicken Spaghetti

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Made it for my family today. Everyone loved it. Thanks for this yummiest recipe.

Haven’t made this recipe yet, but can’t wait to try it. Just love all of your recipes; your instructions are so easy to follow! I am so thankful to have found you on the internet. Thank you!

5 stars
This casserole is very tasty and I will certainly make it again. Next time I think I will add sliced mushrooms at a suggestion from my son, who also enjoyed it.

lauren fesik

5 stars
I made this recipe 2 days ago, and it was sooo good we could not stop eating it. Also, the leftovers were even better!! One sidenote…the prep time was a lot longer than 15 minutes 😒

Nina

I fixed it for supper last night. It is the best chicken spaghetti I have ever had. My family loved it.

Melissa F. Kline

Made this tonight for dinner. It was a hit. I love that your sauce is from scratch.

Mara Parker

I love your recipes. This looks delicious. I will be making it soon without the canned green chilies. I can no longer take chili spices. Thank you for your great recipes & videos. You make it all so simple.

Ruth Blevins

Canned green chilies are not spicy.

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