chicken spaghetti casserole

This cheesy chicken spaghetti casserole is pure comfort in a dish, the kind that warms you up from the inside out. It reminds me of chilly evenings when the aroma of something delicious baking in the oven would fill our entire house, promising a cozy family dinner. It’s a simple, hearty meal that never fails to bring smiles to the table.

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I have so many memories tied to casseroles just like this one. Growing up, my mom had a rotation of baked dishes she’d make, especially when we needed something that could be prepped ahead of a busy week. Watching her stir the creamy sauce, I learned that the best meals aren’t complicated; they’re made with love and a few good ingredients.

This recipe is incredibly hearty and satisfying, perfect for feeding a hungry family, but it’s also wonderfully low-stress to prepare. My biggest tip? Don’t be afraid to taste the sauce as you go! A little extra salt or a pinch of paprika can make all the difference.

What You Need to Make This Recipe

The magic of this chicken spaghetti casserole comes from a few key ingredients: tender chicken, sharp cheddar, and cream cheese, all brought together with a zesty can of diced tomatoes and green chilies. The full ingredient list and measurements are waiting for you in the recipe card below!

How to Make chicken spaghetti casserole

Making this dish is a simple three-step process that feels so rewarding. First, you’ll cook your spaghetti until it’s just al dente. While that’s happening, you’ll whip up a rich and creamy cheese sauce on the stovetop. Finally, you’ll combine everything in a baking dish, top it with more cheese, and bake until it’s bubbly and golden.

Creamy Homestyle Chicken Spaghetti Casserole

A comforting and cheesy bake with tender chicken, spaghetti, and a rich, creamy tomato sauce. This easy chicken spaghetti casserole is the perfect weeknight family dinner!

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Prep Time 25 minutes mins

Cook Time 30 minutes mins

Total Time 55 minutes mins

Servings: 8 servings

Course: Main Course

Cuisine: American, Southern

Calories: 655

Ingredients Equipment Method Notes

Ingredients

  

For the Casserole

• 1 lb spaghetti broken in half
• 2 tbsp olive oil
• 1 large yellow onion finely chopped
• 1 green bell pepper finely chopped
• 3 cloves garlic minced
• 3 cups cooked chicken shredded (rotisserie chicken works great)
• 1/4 cup all-purpose flour
• 2 cups chicken broth low-sodium
• 1 cup half-and-half or whole milk
• 10 oz can diced tomatoes with green chilies undrained (like Rotel)
• 4 oz cream cheese cubed and softened
• 2 cups sharp cheddar cheese shredded and divided
• 1 tsp smoked paprika
• 1 tsp salt or to taste
• 1/2 tsp black pepper freshly ground

Equipment

• 9x13 inch Baking Dish
• Large Pot
• Large Skillet or Dutch Oven
• Whisk

Method

 

Prepare and Cook Pasta

• Preheat your oven to 375°F (190°C). Lightly grease a 9x13 inch baking dish.
• Cook the spaghetti in a large pot of salted boiling water according to package directions, but cook for 1-2 minutes less than the recommended time for al dente. Drain well and set aside.

Make the Creamy Sauce

• While the pasta is cooking, heat the olive oil in a large skillet or Dutch oven over medium-high heat. Add the chopped onion and bell pepper and sauté for 5-7 minutes, until softened.
• Stir in the minced garlic and cook for another minute until fragrant. Sprinkle the all-purpose flour over the vegetables and stir constantly for 1 minute to cook out the raw flour taste.
• Gradually whisk in the chicken broth and half-and-half until smooth. Bring the mixture to a simmer, stirring frequently, until it begins to thicken, about 3-4 minutes.
• Reduce the heat to low. Stir in the undrained can of diced tomatoes with green chilies, the cubed cream cheese, smoked paprika, salt, and pepper. Continue to stir until the cream cheese is fully melted and integrated into the sauce.
• Remove the skillet from the heat. Gradually stir in 1 ½ cups of the shredded cheddar cheese until it's completely melted and the sauce is smooth and creamy.

Assemble and Bake

• In a large mixing bowl, combine the cooked spaghetti, the shredded chicken, and the creamy sauce. Toss gently until everything is evenly coated.
• Pour the chicken spaghetti mixture into the prepared baking dish and spread it into an even layer.
• Sprinkle the remaining ½ cup of shredded cheddar cheese evenly over the top.
• Bake uncovered for 25-30 minutes, or until the casserole is hot, bubbly, and the cheese on top is melted and lightly golden. For a browner top, you can broil for the last 1-2 minutes, watching carefully.
• Remove from the oven and let the casserole rest for 10 minutes before serving. This allows it to set up slightly, making it easier to serve.

Notes

Make-Ahead Tip: Assemble the casserole completely but do not bake. Cover tightly and refrigerate for up to 24 hours. When ready to bake, let it sit at room temperature for 30 minutes, then bake as directed, possibly adding 5-10 minutes to the cooking time.

Storage: Store leftovers in an airtight container in the refrigerator for up to 3-4 days. Reheat individual portions in the microwave.

Pro Tips for Making This chicken spaghetti casserole

Over the years, I’ve learned a few things that take this dish from good to great. Here are some of my favorite tips to ensure your chicken spaghetti casserole turns out perfectly every time.

• Don’t Overcook the Pasta: Cook the spaghetti just until it’s al dente (still has a slight bite). It will continue to cook in the oven as the casserole bakes, and this prevents it from becoming mushy.
• Use Freshly Grated Cheese: Pre-shredded cheese is often coated with anti-caking agents that can make your sauce gritty. Grating your own block of sharp cheddar will give you the smoothest, meltiest results.
• My Secret Trick: Let your cream cheese soften to room temperature before adding it to the sauce. It will melt seamlessly into the broth and half-and-half, creating an ultra-creamy base without any lumps. I just leave it on the counter while I prep the other ingredients.
• Shred Your Own Chicken: While a rotisserie chicken works in a pinch, boiling and shredding your own chicken breasts or thighs gives you more control over the texture and flavor. Plus, you can use the cooking water as a flavorful broth!

Fun Variations for chicken spaghetti casserole

One of the best things about a classic recipe is using it as a starting point for your own creativity. This chicken spaghetti casserole is wonderfully adaptable! If you love experimenting with casseroles, you might also enjoy this cauliflower and broccoli casserole.

• Spice It Up: If your family likes a little heat, swap the sharp cheddar for pepper jack cheese or add a finely diced jalapeño along with the onions and bell peppers.
• Add Some Veggies: This is a great recipe for sneaking in extra vegetables. Sautéed mushrooms, wilted spinach, or even some frozen peas and carrots stirred in before baking are all delicious additions.
• Try Different Pastas: While spaghetti is traditional, feel free to use whatever pasta you have on hand. Penne, rotini, or fettuccine all work beautifully and catch the creamy sauce in different ways.
• Crunchy Topping: For extra texture, mix the final layer of cheese with 1/4 cup of panko breadcrumbs or crushed butter crackers tossed with a tablespoon of melted butter.

What to Serve With chicken spaghetti casserole

This chicken spaghetti casserole is a hearty, all-in-one meal, so I like to keep the side dishes simple and fresh.

A crisp green salad with a light vinaigrette is the perfect contrast to the rich, creamy casserole. I also love serving it with some warm, crusty garlic bread for soaking up any extra sauce left on the plate. If you want to add another vegetable, simple steamed green beans or roasted asparagus are always a great choice.

How to Store chicken spaghetti casserole

One of the best parts about this dish is that the leftovers are just as delicious the next day! Here’s how I store my chicken spaghetti casserole to keep it fresh.

• To Store: Allow the casserole to cool completely, then cover the baking dish tightly with foil or plastic wrap, or transfer it to an airtight container. It will keep in the refrigerator for up to 4 days.
• To Reheat: You can reheat individual portions in the microwave, but my favorite way is to warm it in the oven at 350°F (175°C) for about 15-20 minutes, or until heated through. This helps the top get a little crispy again!

Nutritional Benefits

This satisfying chicken spaghetti casserole offers a good source of protein from the chicken, which is essential for building and repairing tissues. The cheese and half-and-half also provide calcium, making it a well-rounded and comforting meal for the whole family to enjoy.

FAQs

Can I make this casserole ahead of time?

Absolutely! You can assemble the entire chicken spaghetti casserole without baking it, then cover and refrigerate it for up to 24 hours. When you’re ready to eat, you may need to add 10-15 minutes to the baking time since it will be starting from cold.

Can I use a rotisserie chicken for this recipe?

Yes, a store-bought rotisserie chicken is a fantastic time-saver for this recipe! Simply shred the meat and you’re ready to go. It adds a wonderful depth of flavor to the chicken spaghetti casserole and makes prep even easier on a busy weeknight.

Can this chicken spaghetti casserole be frozen?

This casserole freezes beautifully. For best results, bake it and let it cool completely. Cover it tightly with a layer of plastic wrap and then a layer of foil before freezing for up to 3 months. Thaw it overnight in the refrigerator before reheating.

What can I use instead of half-and-half?

If you don’t have half-and-half, you can substitute it with an equal amount of whole milk for a slightly lighter sauce, or heavy cream for an even richer, more decadent texture. Both are great options for this chicken spaghetti casserole.

Conclusion

I hope this recipe brings as much warmth and comfort to your dinner table as it does to mine. It’s a testament to the idea that delicious family meals don’t have to be complicated. This chicken spaghetti casserole is perfect for a cozy weeknight dinner, a potluck with friends, or anytime you need a dish that feels like a hug. For another comforting meal, be sure to check out my chicken potato casserole!

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