The aroma of cheese bubbling in the oven always takes me back to family dinners where warmth and laughter filled the air. Today, I’m excited to share my Creamy Chicken Spaghetti Casserole, a dish that perfectly symbolizes comfort food. This delightful Chicken Spaghetti Bake is not only easy to whip up, but it also brings everyone together at the table. Packed with creamy goodness and tender pasta, it’s the ultimate solution for busy weeknights or when you need to feed a hungry crowd. Not to mention, it’s a make-ahead dream—just prep the night before and let the oven do the work. Ready to dive into this comforting classic? Let’s get cooking!

Why is this Chicken Spaghetti Bake special?
Comforting Family Favorite: This creamy chicken spaghetti casserole brings back memories of laughter-filled family dinners, making it a staple for gatherings.
Effortless Preparation: With the use of rotisserie chicken and staple pantry ingredients, this dish comes together in under an hour.
Make-Ahead Marvel: Simply prepare the night before, store in the fridge, and bake when ready for a hassle-free meal.
Versatile Additions: Feel free to spice things up with jalapeños or sneak in veggies like peas for an extra health boost.
Crowd-Pleasing Taste: Gooey melted cheese atop a hearty mixture ensures that everyone at the table is left smiling, just like with Chicken Bacon Bake or my cozy Chicken Spaghetti.
Chicken Spaghetti Bake Ingredients
• Dive into the layers of flavor with these simple ingredients!
For the Casserole
- Spaghetti – 12 ounces; the perfect base for a creamy pasta delight.
- Cooked Chicken – 2 cups shredded; opt for rotisserie chicken for quick prep.
- Cream of Mushroom Soup – 1 can (10.5 oz); enriches the dish with a creamy texture.
- Cream of Chicken Soup – 1 can (10.5 oz); adds even more creaminess to the casserole.
- Chicken Broth – 1 cup; enhances the overall flavor of the Chicken Spaghetti Bake.
- Sour Cream – 1 cup full-fat; ensures the casserole remains delightfully rich.
- Cheddar Cheese – 1 cup shredded; sharp cheddar packs a flavorful punch.
- Mozzarella Cheese – 1 cup shredded; brings gooeyness to every bite.
- Onion – ½ cup chopped; contributes aromatic depth to the dish.
- Green Bell Pepper – ½ cup chopped; adds a splash of color and optional flavor.
- Garlic – 2 cloves minced; elevates the taste profile of the casserole.
- Seasonings (Salt, Black Pepper, Paprika) – essential for perfectly seasoned layers.
- Butter – 1 tablespoon; used for sautéing the vegetables to enhance flavor.
Now, gather those delicious ingredients and get ready to create a Chicken Spaghetti Bake that your family will fall in love with!
Step‑by‑Step Instructions for Creamy Chicken Spaghetti Bake
Step 1: Preheat and Prepare
Begin by preheating your oven to 350°F (175°C). While the oven heats, generously grease a 9×13-inch baking dish to prevent sticking. This will ensure your Chicken Spaghetti Bake releases easily after baking, creating a delightful presentation for your family or guests.
Step 2: Cook the Spaghetti
In a large pot, bring salted water to a boil and cook 12 ounces of spaghetti according to package instructions until al dente, usually about 8–10 minutes. Once cooked, drain the spaghetti thoroughly and return it to the pot to keep warm while you prepare the other components of the casserole.
Step 3: Sauté the Vegetables
In a large skillet, melt 1 tablespoon of butter over medium heat. Add ½ cup of chopped onion, ½ cup of chopped green bell pepper (if using), and 2 minced cloves of garlic. Sauté for about 5 minutes, stirring occasionally, until the vegetables are softened and fragrant, creating a tasty base for your Chicken Spaghetti Bake.
Step 4: Mix the Sauce
In a spacious mixing bowl, combine 1 can of cream of mushroom soup, 1 can of cream of chicken soup, 1 cup of chicken broth, and 1 cup of full-fat sour cream. Whisk the mixture until smooth and creamy, ensuring there are no lumps. This rich sauce will envelop your pasta and chicken beautifully.
Step 5: Combine Chicken and Veggies
Add 2 cups of shredded cooked chicken and the sautéed vegetables to the creamy sauce in the mixing bowl. Then, season with salt, black pepper, and paprika to taste. Stir everything together until well combined, infusing each ingredient with flavor to create a luscious filling for your Chicken Spaghetti Bake.
Step 6: Toss in the Spaghetti
Gently add the warm spaghetti to the chicken and sauce mixture in the bowl. Carefully toss everything together until the pasta is fully coated and the creamy filling is evenly distributed. This step is crucial for ensuring that each bite of your Chicken Spaghetti Bake is just as delicious as the last.
Step 7: Transfer to Baking Dish
Pour the creamy spaghetti mixture into the prepared 9×13-inch baking dish, spreading it out evenly with a spatula. This will help the dish bake uniformly, creating that perfect blend of textures and flavors in every serving of your Chicken Spaghetti Bake.
Step 8: Add the Cheese Topping
Sprinkle 1 cup of shredded cheddar cheese and 1 cup of shredded mozzarella cheese evenly over the pasta mixture in the baking dish. This cheese layer will melt beautifully, forming a golden, bubbling topping that enhances the comfort and appeal of your Chicken Spaghetti Bake.
Step 9: Bake to Perfection
Place the assembled dish in the preheated oven and bake for 25–30 minutes, or until the cheese is melted, bubbly, and golden on top. Keep an eye on it, and if the cheese begins to brown too quickly, lightly cover it with aluminum foil to prevent burning.
Step 10: Cool and Serve
Once baked, remove the Chicken Spaghetti Bake from the oven and let it sit for about 5 minutes before serving. This resting time allows for easier portioning and helps the casserole set up just right, ensuring every serving maintains its wonderful texture and deliciousness.

What to Serve with Creamy Chicken Spaghetti Casserole
The perfect side dishes can elevate your comforting meal experience, creating a delightful dining atmosphere for family and friends.
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Garlic Bread: This crunchy, buttery delight is perfect for sopping up the creamy sauce, enhancing the rich flavors of the casserole. There’s nothing quite like a flavorful slice of garlic bread to accompany this comforting dish.
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Caesar Salad: Crisp romaine, creamy dressing, and crunchy croutons provide a refreshing contrast to the rich Chicken Spaghetti Bake. The zesty flavors will awaken your palate as you enjoy each bite of your casserole.
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Steamed Broccoli: Lightly steamed and seasoned broccoli adds a colorful, nutritious element, balancing the hearty nature of your meal. Plus, the vibrant green will make your plate pop with freshness!
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Roasted Carrots with Honey Glaze: Sweet, tender carrots bring a lovely touch of sweetness and flavor that pairs beautifully with the savory casserole. Their caramelized edges provide a delightful contrast in texture, making every forkful satisfying.
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Creamy Coleslaw: This cool and crunchy side dish introduces a refreshing element to your meal, balancing the warm, cheesy pasta. It’s perfect for those who enjoy exquisite textures on their plates.
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Apple Crisp for Dessert: A warm, spiced apple crisp with a vanilla ice cream scoop brings a sweet ending to your comfort meal, framing the meal with a nostalgic touch. The warm spices will remind everyone of cherished family gatherings.
Expert Tips for Chicken Spaghetti Bake
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Use Quality Chicken: Opt for rotisserie chicken for convenience; it saves time and delivers great flavor, making your Chicken Spaghetti Bake a breeze.
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Don’t Rush the Sauté: Take your time sautéing the onions and garlic. Properly softened vegetables add depth and enhance the overall flavor of the casserole.
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Pre-Mix Soups Well: Avoid lumps by whisking the cream of mushroom and cream of chicken soups thoroughly. A smooth mixture ensures uniform flavor throughout your Chicken Spaghetti Bake.
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Cool Spaghetti Slightly: Let the cooked spaghetti cool for a few minutes before mixing it in. This helps avoid excess moisture in the casserole.
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Watch the Baking Time: Keep an eye on the cheese while it bakes. If it starts to brown too quickly, cover it with foil to prevent burning while the casserole finishes cooking.
Variations & Substitutions for Chicken Spaghetti Bake
Feel free to get creative and make this Chicken Spaghetti Bake your own! Each tweak can bring a whole new flavor experience to your table.
- Spicy Kick: Add diced jalapeños or a splash of hot sauce to elevate the heat and make it extra exciting!
- Veggie Boost: Toss in frozen peas or corn for a burst of color and nutrients, creating a well-rounded dish. A little extra veggie goodness never hurts!
- Crunchy Topping: Combine crushed Ritz crackers or panko breadcrumbs with melted butter for a crispy topping that adds delightful texture. This creates a beautiful contrast with the creamy filling.
- Turkey Substitute: Switch turkey for chicken to use up those Thanksgiving leftovers, giving a delicious twist to the classic recipe. It’s a fantastic way to enjoy those holiday flavors year-round!
- Bacon Lovers: Crumble some crispy bacon into the mix for an irresistible smoky flavor; it’s the cherry on top of comfort food bliss.
- Dairy-Free Option: Replace sour cream and cheese with plant-based alternatives, making it a fabulous choice for those looking to enjoy a dairy-free meal without skimping on flavor.
- Herb Infusion: Add fresh herbs like parsley or thyme into the chicken mixture for a burst of freshness that dances beautifully with the creamy sauce.
- Garlic Twist: For garlic lovers, throw in extra minced garlic or roasted garlic to amplify that aromatic goodness; it’s a flavorful enhancement with every bite.
Don’t forget to check out my other delicious recipes like the Buffalo Chicken Baked, or indulge in a comforting dish like Mexican Rice Chicken for even more family-friendly options!
Make Ahead Options
This Creamy Chicken Spaghetti Casserole is perfect for busy home cooks looking to save time during the week! You can prepare the entire casserole up to 24 hours in advance by assembling it in a greased baking dish, covering it tightly with foil, and refrigerating. This keeps all the delicious flavors intact while preventing the pasta from becoming mushy. To maximize the quality, consider adding the cheese topping right before baking, so it stays fresh and melts perfectly. When you’re ready to enjoy your comforting meal, simply pop it in a preheated oven and bake as directed, allowing yourself to savor a hassle-free family dinner!
How to Store and Freeze Chicken Spaghetti Bake
Fridge: Store leftover Chicken Spaghetti Bake in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave or oven until warmed through.
Freezer: For longer storage, freeze the casserole before baking. Wrap it tightly in plastic wrap, then foil, and keep in the freezer for up to 3 months. Thaw overnight in the fridge before baking.
Make-Ahead: You can assemble the Chicken Spaghetti Bake up to 24 hours in advance. Store it in the refrigerator covered to save time on busy evenings.
Reheating: Reheat leftovers by placing them in a preheated oven at 350°F (175°C) for about 20-25 minutes, or until hot and bubbling.

Creamy Chicken Spaghetti Casserole Recipe FAQs
How do I choose the right spaghetti for this recipe?
Absolutely! For the best outcome, I recommend using traditional spaghetti, which gives the casserole a hearty texture. Don’t go for whole wheat spaghetti as it may alter the taste and creamy sauce consistency. Cook it until al dente, so it holds up well during baking.
How should I store leftover Chicken Spaghetti Bake?
Leftover Chicken Spaghetti Bake can be kept in the refrigerator for up to 4 days. Just place it in an airtight container to retain its moisture and flavor. When reheating, aim for a temperature of 350°F (175°C) and cover it with foil to keep it from drying out.
Can I freeze the Chicken Spaghetti Bake? How?
Certainly! To freeze, prepare the casserole but do not bake it. Wrap it tightly in plastic wrap and aluminum foil to avoid freezer burn, and it will last up to 3 months. When you’re ready to bake, thaw it overnight in the fridge and then bake as instructed.
What if my casserole is too dry after baking?
If you notice your Chicken Spaghetti Bake is dry, don’t worry! Next time, make sure to incorporate enough sauce and consider adding a bit more chicken broth or sour cream to the mixture. If it still appears dry after baking, a sprinkling of chicken broth or a drizzle of melted butter can help.
Is this recipe suitable for my family with allergies?
Very! However, if anyone has dairy allergies, feel free to substitute the cheese and sour cream with non-dairy options, like cashew cheese and coconut yogurt. Always check labels on the canned soups as they may contain allergens. Enjoy this comforting dish with peace of mind!

Creamy Chicken Spaghetti Bake That's Pure Comfort Bliss
Ingredients
Equipment
Method
- Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking dish to prevent sticking.
- In a large pot, bring salted water to a boil and cook 12 ounces of spaghetti until al dente, about 8–10 minutes. Drain and keep warm.
- In a large skillet, melt 1 tablespoon of butter over medium heat. Sauté ½ cup of chopped onion, ½ cup of chopped green bell pepper, and 2 minced cloves of garlic for about 5 minutes.
- In a mixing bowl, combine 1 can of cream of mushroom soup, 1 can of cream of chicken soup, 1 cup of chicken broth, and 1 cup of full-fat sour cream. Whisk until smooth.
- Add 2 cups of shredded cooked chicken and the sautéed vegetables to the creamy sauce. Season with salt, black pepper, and paprika, then stir until combined.
- Gently add the warm spaghetti to the chicken and sauce mixture and toss until the pasta is fully coated.
- Pour the mixture into the prepared baking dish, spreading it out evenly.
- Sprinkle 1 cup of shredded cheddar cheese and 1 cup of shredded mozzarella cheese over the pasta mixture.
- Bake for 25–30 minutes, until the cheese is melted, bubbly, and golden on top.
- Let it cool for about 5 minutes before serving.

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