Home Dinner Chicken Chicken Spaghetti Casserole

Chicken Spaghetti Casserole

Chicken spaghetti casserole is a cozy, comforting classic that never disappoints!

This dish is a beautiful blend of tender spaghetti, juicy shredded chicken, creamy mushroom soup, and a mix of veggies.

I love how easy this dish comes together. It’s a great way to use up leftover rotisserie chicken.

Baked until bubbly and golden, this casserole is the epitome of comfort food.

Cheesy chicken spaghetti casserole lifted by a wooden ladle.
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Why You’ll Love This Chicken Spaghetti Casserole

Crowd-Pleaser: This comforting casserole is sure to be a hit with family and friends of all ages.

Time-Saver: Using pre-cooked shredded chicken and canned soups helps this dish come together quickly. It saves you so much time!

Freezer-Friendly: This casserole freezes beautifully, allowing you to stock up for busy days.

Budget-Friendly: With ingredients like spaghetti, canned soups, and basic vegetables, it’s easy on the wallet.

Cheesy chicken spaghetti casserole in baking dish garnished with chopped onions.

Ingredients

  • Spaghetti: The perfect al dente pasta base to soak up all that creamy, cheesy sauce.
  • Cooked Shredded Chicken: You get tender, flavorful chicken bites in every forkful. Rotisserie chicken works great here!
  • Cream of Mushroom Soup: The secret to the rich, velvety sauce that coats each spaghetti strand.
  • Chicken Broth: It adds a savory depth of flavor to the creamy casserole.
  • Veggies: Onion, green bell pepper, and diced pimentos provide pops of color, texture, and flavor.
  • Sharp Cheddar Cheese: Ooey, gooey, and oh-so-cheesy, it’s the ultimate comfort food topping.
  • Seasonings: I use seasoned salt, cayenne pepper, salt, and black pepper. 
Baked cheesy chicken spaghetti casserole in a baking dish.

How to Make Chicken Spaghetti Casserole

This casserole couldn’t be easier! 

1. Preheat and grease. Preheat the oven to 350°F. Grease a 9×13-inch baking dish.

2. Cook the spaghetti. Cook the spaghetti in a large pot of salted boiling water until al dente. Drain well.

3. Mix all the ingredients. In a large bowl, mix together the cooked spaghetti, shredded chicken, cream of mushroom soup, chicken broth, diced onion, bell pepper, pimentos, 1 1/2 cups of cheddar cheese, seasoned salt, cayenne, salt, and black pepper until combined.

4. Transfer to dish. Pour the mixture into the prepared baking dish. Top with the remaining 1/2 cup of cheddar cheese.

5. Bake the casserole. Bake uncovered for 35-40 minutes until bubbly and the cheese is melted and lightly browned on top.

6. Rest and serve. Let stand for 5 minutes before serving. Enjoy!

Cheesy chicken spaghetti casserole in plate lifted by fork.

Tips for the Best Chicken Spaghetti Casserole

Follow these simple tips for the very best results. 

  • Put in some elbow grease. Shred cheese from a block for better melting and texture instead of using pre-shredded.
  • Vary the veggies. Add your favorite vegetables like mushrooms, bell peppers, or onions to the casserole.
  • Give it some crunch. For added texture, top the casserole with crushed crackers, potato chips, tortilla chips, or breadcrumbs before baking.
  • Try tasty variations. Use different cheeses like pepper jack, stir in some sour cream, or top with crushed crackers or breadcrumbs for variety.
  • Make it a complete meal. Pair the rich, creamy casserole with a simple green salad, steamed or roasted vegetables, and garlic bread or rolls.
Cheesy chicken spaghetti casserole serving in plate with fork.

How to Store

Leftovers of this casserole reheat beautifully! 

To Store: Place the cooled casserole in an air-tight container and refrigerate for up to 3-4 days. Ensure it’s tightly sealed to maintain freshness.

To Freeze: Wrap the casserole tightly with both plastic wrap and aluminum foil. Or place in a freezer-safe air-tight container, and freeze for up to 2 months. Thaw overnight in the refrigerator before reheating.

To Reheat: For best results, reheat the casserole in the oven at 350°F until heated through, approximately 20-25 minutes. If using a microwave, cover the dish and heat on high for 2-3 minutes, stirring halfway through to ensure even warming.

Chicken Spaghetti Casserole

Course: Main CourseCuisine: American
Servings

8

servings
Prep time

15

minutes
Cooking time

40

minutes
Calories

354

kcal

This hearty, cheesy chicken spaghetti casserole is pure comfort food. The tender chicken, creamy sauce, and gooey cheese make it a satisfying one-dish meal.

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Ingredients

  • 1 lb thin spaghetti, broken into 2-inch pieces

  • 2 cups cooked shredded chicken

  • 2 cans cream of mushroom soup

  • 1 cup chicken broth

  • 1 medium onion, diced

  • 1 green bell pepper, diced

  • 1 jar diced pimentos, drained

  • 2 cups shredded sharp cheddar cheese, divided

  • 1 tsp seasoned salt

  • 1/4 tsp cayenne pepper

  • Salt and black pepper to taste

Instructions

  • Preheat the oven to 350°F. Grease a 9×13-inch baking dish.
  • Cook the spaghetti in a large pot of salted boiling water until al dente. Drain well.
  • In a large bowl, mix together the cooked spaghetti, shredded chicken, cream of mushroom soup, chicken broth, diced onion, bell pepper, pimentos, 1 1/2 cups of the cheddar cheese, seasoned salt, cayenne, salt, and black pepper until combined.
  • Pour the mixture into the prepared baking dish. Top with the remaining 1/2 cup of cheddar cheese.
  • Bake uncovered for 35-40 minutes until bubbly and the cheese is melted and lightly browned on top.
  • Let stand for 5 minutes before serving. Enjoy!

Notes

  • Use a combination of white and dark meat chicken for the best flavor and texture.
  • Cook the spaghetti until just al dente so it doesn’t get mushy when baked.
  • Use block cheddar cheese and shred it yourself for a smoother, creamier sauce.

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author avatar
Kim - InsanelyGood
Hey there! I'm Kim. I love running, cooking, and curling up with a good book! I share recipes for people who LOVE good food, but want to keep things simple :)

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