Name: Chicken Spaghetti Casserole Recipe
Prep time: 30 min
Cook time: 45 min
Total time: PT-498149H54M49S
Cuisine: American
Ingredients: 2 cups cooked chicken, shredded or chopped; 3 cups spaghetti, uncooked and broken into two-inch pieces; 2 cans cream of mushroom soup; 3 cups grated sharp cheddar cheese, divided; 1/4 cup finely diced green pepper; 1/4 cup finely diced onion; 1 (4-oz.) jar diced pimentos, drained; 2 cups reserved chicken broth (from cooking chicken); 1 teaspoon Lawry's Seasoned Salt; 1/8 to 1/4 teaspoon cayenne pepper; Salt and black pepper to taste

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If you’re craving a comfort dish that wraps you in a warm hug from the inside, this Chicken Spaghetti Casserole Recipe is exactly what you need. Rich, cheesy, and packed with tender chicken and perfectly cooked spaghetti, it’s a timeless family favorite that turns simple ingredients into magic. Every bite delivers a creamy texture, a mild kick from cayenne, and a burst of color from diced pimentos and green peppers, making it as beautiful as it is delicious. Let me take you through this classic casserole that I’m sure will become a staple in your recipe box too.

Ingredients You'll Need

A white rectangular dish filled with creamy yellow pasta covered in melted cheese, with some black mushrooms mixed in. A black serving fork lifts a portion of the long pasta strands, showing their smooth and soft texture, with the sauce clinging to them. The dish is on a white marbled surface, with a light cloth visible near the bottom right corner, giving a cozy feeling. photo taken with an iphone --ar 4:5 --v 7

This Chicken Spaghetti Casserole Recipe relies on straightforward ingredients that work together beautifully to create its signature creamy, cheesy charm. Each component adds a unique touch – from the sharp cheddar’s richness to the gentle heat from cayenne pepper, all balanced with the freshness of diced onions and green peppers.

2 cups cooked chicken: Use tender, shredded chicken for a hearty protein base.

3 cups spaghetti (uncooked, broken into 2-inch pieces): Breaking the spaghetti helps it mix evenly and bake perfectly within the casserole.
2 cans cream of mushroom soup: Acts as the creamy binder bringing all flavors together smoothly.
3 cups grated sharp cheddar cheese: Provides a rich, tangy flavor and gooey texture crucial for this dish.

¼ cup finely diced green pepper: Adds a fresh crunch and lovely color contrast.
¼ cup finely diced onion: For depth of flavor and a subtle bite.
1 (4-oz.) jar diced pimentos, drained: Adds a smoky sweetness and vibrant pop of red.

2 cups reserved chicken broth from pot: Used to cook the pasta and infuse the casserole with savory richness.
1 teaspoon Lawry's Seasoned Salt: Adds a blend of herbs and spices to enhance flavor complexity.
⅛ to ¼ teaspoon cayenne pepper: A controlled kick of heat to keep every bite interesting without overpowering.

Salt and pepper, to taste: The essential seasonings that pull the entire dish together perfectly.

How to Make Chicken Spaghetti Casserole Recipe

Step 1: Prepare the Chicken and Broth

Start by cooking a fryer chicken until tender, then pick out the meat to get about two cups of cooked chicken. Reserve two cups of the broth after cooking the chicken—it will add incredible flavor when you cook your pasta and mix the casserole.

Step 2: Cook the Spaghetti

Using the reserved chicken broth, cook the broken spaghetti pieces until just al dente. It’s important not to overcook because the pasta will continue to cook in the oven and absorb all those delicious flavors. This ensures it remains perfectly tender without getting mushy.

Step 3: Mix Ingredients Together

In a large bowl, combine the cooked chicken, spaghetti, cream of mushroom soup, green pepper, onion, pimentos, seasoned salt, cayenne pepper, and a pinch of salt and pepper. Stir gently but thoroughly to evenly distribute all the lovely ingredients so each bite is balanced.

Step 4: Assemble and Bake

Spread the mixture into a casserole pan and top with one cup of the grated sharp cheddar cheese for that glorious bubbly crust. Bake at 350°F for 45 minutes until the casserole is bubbling and the cheese is beautifully melted. If the cheese browns too quickly, lay foil over the top to prevent burning while the casserole finishes baking.

How to Serve Chicken Spaghetti Casserole Recipe

A close-up view of a baked pasta dish in a white rectangular baking dish with a blue rim, showing three layers: the bottom layer of long, thin yellow spaghetti noodles, the middle layer with chunks of red tomatoes and small pieces of white chicken, and the top layer covered with melted, lightly browned cheese scattered with green parsley bits. A spoon lifts a portion from the dish, highlighting the mix of creamy cheese, soft noodles, and juicy tomatoes, all glistening under soft light on a white marbled surface. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

A sprinkle of freshly chopped parsley or a few extra pimento strips on top adds a fresh, inviting touch. You can also add a dollop of sour cream or a squeeze of lemon on the side to brighten the flavors and balance the richness.

Side Dishes

This classic Chicken Spaghetti Casserole Recipe pairs wonderfully with a simple green salad or steamed vegetables like broccoli or green beans to keep things fresh. Garlic bread or warm dinner rolls are perfect for mopping up any cheesy sauce left on your plate.

Creative Ways to Present

Try serving individual casserole portions in small ramekins for a charming presentation at family dinners or potlucks. Alternatively, top your casserole with crispy fried onions or crushed buttery crackers for added texture and a fun twist.

Make Ahead and Storage

Storing Leftovers

After enjoying your delicious Chicken Spaghetti Casserole Recipe, store leftovers in an airtight container in the refrigerator for up to two days. This keeps the flavors fresh and the texture just right for your next meal.

Freezing

If you want to prepare this casserole in advance, assemble it but don’t bake, then cover tightly and freeze for up to six months. When you're ready, just bake it straight from the freezer, adding extra time to ensure it is heated through.

Reheating

Reheat leftovers gently in the oven at 350°F until warmed through and bubbly again, or use the microwave for a quick fix, stirring occasionally to heat evenly without drying.

FAQs

Can I use a different type of cheese in this Chicken Spaghetti Casserole Recipe?

Absolutely! While sharp cheddar is traditional and provides a nice tang, you can experiment with mozzarella for a milder, gooier finish or a Mexican cheese blend to add complexity.

Is it okay to substitute cream of mushroom soup with a homemade sauce?

Yes! A homemade white sauce made with butter, flour, and milk works beautifully if you want to avoid canned ingredients. It gives you control over flavor and texture.

Can I make this casserole vegetarian?

You can swap out the chicken for hearty veggies like mushrooms, zucchini, or spinach, and use vegetable broth instead of chicken broth to create a tasty vegetarian version.

What’s the best type of chicken for this recipe?

Using a whole fryer chicken or chicken breasts works best since they yield tender, shreddable meat. Leftover roasted chicken is also a great shortcut!

Can I add other vegetables to the casserole?

Definitely! Feel free to include chopped mushrooms, peas, or even corn to boost nutrition and add texture contrast to this versatile Chicken Spaghetti Casserole Recipe.

Final Thoughts

This Chicken Spaghetti Casserole Recipe is more than just a meal; it’s a warm invitation to comfort and joy on a plate. Its simple ingredients transform into something truly special, making it an effortless favorite for weeknights or gatherings. I hope you give this heartwarming dish a try and share it with those you love. Trust me, it’s destined to become your go-to comfort casserole.

Ingredients You'll Need