Chicken Spaghetti Casserole is the kind of warm, creamy, comforting dish that defines Southern potluck culture — a simple, honest bake of tender shredded chicken, spaghetti noodles, and a trio of sautéed vegetables, all bound together in a silky, savory cream of chicken soup and broth sauce, then crowned with a blanket of melted cheddar cheese. This recipe is a celebration of pantry staples and resourceful cooking, transforming leftover rotisserie chicken (or any cooked chicken you have on hand) into a satisfying, family-friendly casserole that comes together with minimal fuss. The magic begins with a classic mix-in of chopped celery, onions, and bell peppers — the “holy trinity” of Cajun and Southern cooking — which add aromatic depth, subtle sweetness, and a bit of crunch to contrast with the tender chicken and spaghetti.
The brilliance of this casserole lies in its simplicity and the way it uses canned soup as a shortcut without sacrificing homemade flavor. The combination of chicken broth and two cans of cream of chicken soup creates a rich, velvety sauce that coats every strand of spaghetti and every shred of chicken, keeping the casserole moist and creamy as it bakes. The foil-covered bake allows the flavors to meld and the spaghetti to absorb the savory liquid, while the final uncovered minutes give the cheddar cheese a chance to bubble and brown into a glorious, golden crust. The result is a casserole that is creamy but not soupy, cheesy but not overwhelming, and deeply satisfying in that way only a classic baked pasta can be. Serve it with a green salad and crusty bread for a complete meal, or bring it to a potluck — just be prepared to share the recipe.
Why You’ll Love This Recipe:
- Creamy, Cheesy, and Comforting: A rich, savory sauce coats every bite of chicken and spaghetti.
- Pantry-Friendly: Uses canned soups and simple vegetables — no fancy ingredients required.
- Great for Using Leftover Chicken: Perfect for rotisserie chicken or any leftover cooked chicken.
- Family-Friendly: Mild flavors that appeal to both kids and adults.
- Make-Ahead & Freezer-Friendly: Assemble in advance and bake when ready.
Ingredients:
For the Casserole:*
3 cups shredded cooked chicken (rotisserie chicken works beautifully)
8 ounces spaghetti noodles, cooked al dente
⅔ cup celery, chopped
1 cup yellow onion, chopped
1 cup bell pepper (any color), chopped
1 cup low-sodium chicken broth
2 cans (10.5 oz each) cream of chicken soup
1 cup shredded cheddar cheese
Kosher salt and freshly ground black pepper, to taste
Instructions:
Step 1: Preheat Oven*
Preheat your oven to 350°F (175°C).
Step 2: Combine the Main Ingredients*
In a large mixing bowl, combine the shredded chicken, cooked spaghetti noodles, chopped celery, chopped onions, and chopped bell pepper. Toss gently to distribute the vegetables evenly.
Step 3: Make the Sauce*
In a separate medium bowl, whisk together the chicken broth, cream of chicken soup, salt, and pepper until smooth.
Step 4: Combine and Transfer*
Pour the soup mixture over the chicken and spaghetti mixture. Stir until everything is evenly coated. Transfer the mixture to a greased 9×13-inch baking dish and spread it into an even layer.
Step 5: Top with Cheese*
Sprinkle the shredded cheddar cheese evenly over the top of the casserole.
Step 6: Bake Covered*
Cover the baking dish with aluminum foil. Bake for 35 minutes.
Step 7: Bake Uncovered*
Remove the foil and bake for an additional 10 minutes, until the cheese is melted, bubbly, and lightly golden around the edges.
Step 8: Serve*
Let the casserole rest for 5-10 minutes before serving.
Tips:
- Use Rotisserie Chicken: It’s flavorful, easy to shred, and saves time. About half a rotisserie chicken yields roughly 3 cups of shredded meat.
- Cook Spaghetti Al Dente: The pasta will continue to absorb liquid as it bakes, so slightly undercook it to avoid mushy noodles.
- Don’t Skip the Vegetables: The celery, onion, and bell pepper add essential flavor and texture. Chop them finely so they blend into the casserole.
- Customize the Cheese: Sharp cheddar adds bold flavor, but a blend of cheddar and Monterey Jack, or even a sprinkle of Parmesan on top, works beautifully.
- Add a Crunchy Topping: For extra texture, mix ½ cup of crushed Ritz crackers or panko breadcrumbs with 2 tablespoons of melted butter and sprinkle over the cheese before baking.
Storage Options:
- Refrigerator: Store leftovers in an airtight container in the refrigerator for up to 4 days.
- Freezer: This casserole freezes well for up to 2 months. Assemble completely (without baking), wrap tightly in plastic wrap and foil, and freeze. Thaw overnight in the refrigerator before baking as directed (add 10-15 minutes to the covered bake time).
- Reheating: Reheat individual portions in the microwave, or cover the dish with foil and reheat in a 350°F oven for 15-20 minutes.
Chicken Spaghetti Casserole is the kind of dish that reminds you why casseroles exist — they’re warm, they’re comforting, they feed a crowd, and they taste like home. Whether you’re feeding your family on a busy weeknight or bringing a dish to a neighbor in need, this one’s a keeper. Enjoy!
