Creamy Chicken Spaghetti Casserole – The Ultimate Comfort Food

When it comes to comfort food, Chicken Spaghetti Casserole is an all-time favorite that brings families together at the dinner table. This creamy, cheesy, and hearty dish is the perfect combination of tender shredded chicken, al dente spaghetti, and a rich, savory sauce. Each bite is filled with flavor, thanks to a medley of aromatic vegetables, tangy cream of chicken soup, and melted cheddar cheese.

Whether you’re making this for a busy weeknight dinner, a potluck, or just to enjoy some cozy comfort food, this recipe is sure to become a go-to in your household. The best part? It’s simple to make, can be prepared ahead of time, and feeds a crowd!

Ingredients & Their Role

For the Chicken Spaghetti Casserole

3 cups shredded chicken – The star of the dish, providing protein and a hearty texture. You can use rotisserie chicken, boiled and shredded chicken breast, or even leftover grilled chicken.
12 oz. spaghetti – The base of the dish that soaks up all the delicious flavors. Regular spaghetti or thin spaghetti works best.
2 cans (10.5 oz. each) cream of chicken soup – This adds the rich, creamy texture and deepens the flavor of the dish. You can also substitute with cream of mushroom soup for variety.
1 cup chicken broth – Enhances the overall flavor and prevents the casserole from drying out.
1 cup shredded cheddar cheese – Cheddar cheese melts beautifully, creating that deliciously gooey texture. Feel free to mix in some Monterey Jack for extra cheesiness.
1 cup bell pepper, diced – Adds a pop of color and a slightly sweet crunch. Green, red, yellow, or orange bell peppers all work great.
1 cup onion, chopped – Enhances the dish with a subtle sweetness and depth of flavor.
½ cup celery, chopped – Provides a hint of crunch and a mild, fresh taste.
2 cans cream of chicken soup – Gives the casserole its signature creamy, rich consistency.
2 large eggs, beaten – Helps bind everything together, giving the casserole structure.
1 tablespoon dried sage (or more to taste) – Brings in that classic, earthy, Southern flavor.
Salt and ground black pepper, to taste – Seasoning is key to enhancing all the ingredients and tying everything together.

Step-by-Step Instructions

Step 1: Prep the Oven & Cook the Spaghetti

Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish to prevent sticking. In a large pot, bring salted water to a boil and cook the spaghetti until it’s al dente, following the package instructions. Drain and set aside.

Step 2: Sauté the Vegetables

In a large skillet over medium heat, sauté the diced onion, bell pepper, and celery in a bit of olive oil or butter until softened and fragrant. This process releases their natural flavors and enhances the overall taste of the casserole.

Step 3: Prepare the Creamy Sauce

In a large bowl, combine:

2 cups of shredded cheddar cheese
2 cups of chicken broth (for moisture and rich flavor)
2 cans of cream of chicken soup (the base for our creamy texture)
1 tablespoon dried sage (for a warm, herby taste)
Salt & ground black pepper (to taste)

Mix everything until well combined.

Step 4: Assemble the Casserole

In a greased baking dish, layer half of the cooked spaghetti at the bottom. Then, evenly spread half of the chicken over the spaghetti. Pour half of the creamy sauce mixture over the top.

Repeat the layers: another layer of spaghetti, the remaining chicken, and the last of the sauce. Finally, sprinkle the shredded cheddar cheese on top to create a cheesy crust.

Step 5: Bake to Perfection

Cover with aluminum foil and bake in a 350°F preheated oven for 35 minutes. Then, remove the foil and bake for an additional 10 minutes until the cheese is golden and bubbling.

Step 6: Let It Set & Serve

Once done, let the casserole rest for 5-10 minutes before serving. This helps the layers set and makes it easier to cut into portions.

Why This Chicken Spaghetti Casserole Is a Must-Try

The Ultimate Comfort Food – Creamy, cheesy, and full of flavor.
Perfect for Busy Nights – Quick, easy, and only one dish needed.
Great for Leftovers – It tastes even better the next day!
Family-Favorite Dish – Kids and adults alike will love every single bite.

Pro Tips for the Best Chicken Spaghetti Casserole

Use Rotisserie Chicken – Save time by using a store-bought rotisserie chicken for effortless prep.
Don’t Overcook the Pasta – Cook until just al dente, so it doesn’t become mushy in the oven.
Add Some Heat – A dash of red pepper flakes or cayenne can elevate the flavor.
Customize the Cheese – Try a mix of mozzarella and pepper jack for a unique twist.

How to Serve Chicken Spaghetti Casserole

Garnish with Fresh Herbs – Sprinkle fresh parsley or basil on top for extra color and flavor.
Pair with Garlic Bread – The perfect way to soak up every bit of the creamy, cheesy goodness.
Add a Fresh Salad – A crisp garden salad with a zesty dressing balances out the richness of the dish.

Final Thoughts

Comfort food at its finest, this Creamy Chicken Spaghetti Casserole is a guaranteed crowd-pleaser. It’s easy to make, packed with rich and savory flavors, and perfect for feeding a family or impressing guests. Whether it’s a cozy weeknight dinner or a special occasion, this dish is sure to become a staple in your recipe collection.

Give it a try and let us know—what’s your favorite way to enjoy chicken spaghetti casserole? Share your thoughts in the comments below! Happy cooking!