Welcome to the ultimate guide for creating a truly memorable Baked Chicken and Spaghetti casserole! This beloved dish, infused with the rich creaminess of cream cheese, stands out as a quintessential comfort food, perfect for bringing warmth to any dinner table, any night of the week. Imagine tender cooked chicken and perfectly al dente spaghetti, bathed in a lusciously smooth, cheesy sauce, then topped generously with melted mozzarella and baked until golden and bubbling. It’s an irresistible combination that consistently earns rave reviews from family and friends alike.
If you’re seeking to expand your repertoire of delectable baked pasta recipes, you’re in for a treat. Explore other delightful options such as the hearty Slow Cooker Tortellini Pasta Bake, the robust Ground Beef Pasta Bake, or the ever-popular Meatball Pasta Bake. Each offers a unique spin on baked pasta, promising satisfying meals for every occasion.

The Ultimate Creamy Baked Chicken and Spaghetti Casserole
This simple yet profoundly satisfying chicken spaghetti casserole isn’t just a meal; it’s a culinary hug that’s become a cherished tradition in many households. While the foundational recipe for this creamy, cheesy pasta dish is fantastic on its own, its true beauty lies in its remarkable adaptability. Whether you prefer to adhere strictly to the original or get creative with a few personal touches, this recipe encourages culinary exploration. Feel free to dial up the spice, experiment with different cheese varieties, or incorporate any leftover vegetables you might have on hand for an extra layer of flavor and nutrition.
One of the most appealing aspects of this baked chicken and spaghetti recipe is its incredible versatility, particularly when it comes to using leftover chicken. This dish is your perfect companion for transforming cooked chicken breasts, succulent crockpot shredded chicken, or even a store-bought rotisserie chicken that needs a new purpose. Regardless of its origin, your cooked chicken will seamlessly integrate into this casserole, contributing to an equally delicious and heartwarming result, saving you valuable time and effort in the kitchen.
Beyond its delicious taste and ease of preparation, this recipe offers another significant advantage: it’s an excellent candidate for a freezer meal! Imagine the convenience of preparing a batch for immediate enjoyment and another to stash away for a busy evening when cooking from scratch isn’t an option. This makes it an ideal choice for meal prepping and ensures you always have a comforting, homemade meal within reach. If you’re constantly on the lookout for affordable dinner ideas or inspiring healthy chicken recipes, make sure to browse our extensive list for a wealth of dinner inspiration that caters to every taste and budget.
Why You’ll Adore This Creamy Chicken Spaghetti Bake
This creamy chicken spaghetti bake isn’t just another dinner recipe; it’s a testament to the power of simple ingredients creating extraordinary flavor. Here’s why it’s destined to become a staple in your kitchen:
- Effortless Weeknight Meal: With much of the prep utilizing pre-cooked chicken, this casserole comes together with minimal fuss, making it perfect for busy evenings.
- Ultimate Comfort Food: The rich, creamy sauce combined with tender chicken and pasta creates a dish that feels like a warm hug, satisfying even the pickiest eaters.
- Family-Friendly Favorite: Its universally appealing flavors ensure that everyone from toddlers to adults will ask for seconds.
- Budget-Conscious: Utilizing leftover chicken and pantry staples, this recipe is incredibly economical without sacrificing taste or quality.
- Freezer-Friendly: Prepare a double batch and freeze one for later, offering a convenient solution for future meals. It’s ideal for meal prep and makes thoughtful gifts for new parents or friends in need.
- Customizable: Easily adapt the flavors to your liking by adding different vegetables, spices, or cheeses.
- Minimal Cleanup: Most of the cooking happens in one pot and a baking dish, simplifying your post-dinner cleanup routine.
Essential Ingredients for Perfect Chicken Spaghetti Casserole
Crafting the perfect Baked Chicken and Spaghetti Casserole relies on a few key ingredients that come together to create its signature creamy texture and comforting flavor. Here’s a closer look at what you’ll need and why each component is vital:
- Spaghetti: As its name suggests, spaghetti noodles are the traditional choice here, offering that classic long-strand texture that beautifully captures the creamy sauce. However, this recipe is forgiving; feel free to substitute with other pasta shapes like linguine, penne, fettuccine, or even medium shells if that’s what you have on hand. The key is to cook your pasta to an al dente stage, as it will continue to cook and absorb flavors in the oven.
- Chicken Broth: This liquid gold forms the flavorful base of our creamy sauce. Store-bought chicken broth or homemade chicken stock both work wonderfully. Opt for a low-sodium version if you prefer to control the salt content.
- Cream Cheese: The secret to the casserole’s unparalleled creaminess! Full-fat cream cheese is highly recommended for the richest, most luxurious sauce, but a reduced-fat version can also be used if desired. Ensure it’s softened to room temperature for easier blending into a smooth sauce.
- Sour Cream: Adding another layer of velvety texture and a subtle tang, sour cream perfectly complements the cream cheese. Both full-fat and light sour cream will yield excellent results. For an alternative, especially if you enjoy a more classic casserole flavor, you can substitute the sour cream with a can of either Cream of Mushroom Soup or Cream of Chicken Soup.
- Garlic Powder: A foundational aromatic that infuses the sauce with a warm, savory depth. If you prefer fresh garlic, mince 2-3 cloves and sauté them lightly before adding the broth.
- Parmesan Cheese: This sharp, salty cheese adds a wonderful umami flavor to the sauce. Shredded or grated Parmesan will work, but freshly grated Parmesan often melts more smoothly and offers a superior flavor profile.
- Cooked Chicken: The star protein! This recipe is ideal for repurposing cooked chicken. Whether it’s a store-bought rotisserie chicken, leftover shredded chicken from a slow cooker, or simply chicken breasts you’ve boiled or baked specifically for this dish, ensure it’s diced into ½-inch chunks for easy eating. Using pre-cooked chicken significantly cuts down on preparation time.
- Mozzarella Cheese: The crowning glory that creates that irresistible golden, bubbly top. You can shred your own from a block for a better melt, or use pre-shredded mozzarella for convenience. Don’t hesitate to experiment with a blend of cheeses, such as sharp cheddar, Monterey Jack, or even a Colby Jack mix, for a unique twist.
- Fresh Parsley (for garnish): While optional, a sprinkle of fresh chopped parsley after baking adds a pop of color and a fresh herbaceous note, enhancing the dish’s overall appeal.

Step-by-Step Guide to Making Creamy Chicken Spaghetti Casserole
Creating this delicious chicken spaghetti casserole is surprisingly straightforward. Follow these steps to achieve a perfectly creamy, cheesy, and satisfying baked pasta dish:
- Preheat Oven: Begin by preheating your oven to 350°F (175°C). This ensures your casserole bakes evenly and achieves that desirable golden, bubbly top.
- Cook Spaghetti: In a large pot of salted boiling water, cook the spaghetti noodles according to package instructions until they are al dente. This means they should be firm to the bite, as they will soften further during baking. Drain the cooked spaghetti thoroughly and set it aside.
- Prepare the Creamy Sauce: While the spaghetti cooks, prepare your luscious sauce. In a separate large pot or Dutch oven over medium heat, combine the chicken broth, softened cream cheese, sour cream, and garlic powder. Bring the mixture to a gentle simmer, stirring continuously until all the ingredients are fully combined and the sauce is smooth and lump-free. Avoid high heat to prevent scorching.
- Combine and Transfer to Baking Dish: Once the sauce is silky smooth, remove the pot from the heat. Carefully add the drained cooked spaghetti, shredded Parmesan cheese, the diced cooked chicken, and half of the mozzarella cheese to the sauce. Gently mix everything together until the spaghetti and chicken are thoroughly coated with the creamy sauce. Evenly spread this mixture into a greased 9″ x 13″ casserole dish.
- Bake to Perfection: Sprinkle the remaining mozzarella cheese over the top of the spaghetti mixture in the baking dish. Place the casserole in your preheated oven and bake for 20-30 minutes. The casserole is ready when the cheese on top is beautifully melted, golden, and bubbling around the edges.
- Serve and Enjoy: Carefully remove the baked casserole from the oven. For an extra touch of freshness and color, garnish with fresh chopped parsley before serving. Allow it to rest for a few minutes before serving hot. This brief resting period helps the sauce set slightly, making it easier to serve. Enjoy your homemade, comforting chicken spaghetti!
Creative Variations and Additions for Your Chicken Spaghetti
While the classic Baked Chicken and Spaghetti Casserole is wonderful as is, it also serves as a fantastic canvas for culinary creativity. Beyond the ingredient substitutions mentioned earlier, here are some exciting ideas to customize your casserole and keep things fresh:
- Mexican Chicken Spaghetti: Infuse your casserole with vibrant Tex-Mex flavors. Add a can of diced tomatoes (drained), diced green bell peppers, and a small can of mild green chilis to the sauce mixture. A sprinkle of taco seasoning or chili powder can further enhance this theme. Consider topping with a blend of Monterey Jack and cheddar cheese.
- Veggie Spaghetti Bake: For a meatless marvel or to boost your vegetable intake, omit the chicken and load up on sautéed vegetables. Excellent choices include sliced mushrooms, diced bell peppers (any color), zucchini, broccoli florets, and fresh spinach (stirred in at the end until wilted). Sautéing the harder vegetables beforehand ensures they are tender when the casserole finishes baking.
- Shrimp Spaghetti: For a delightful seafood twist, replace the cooked chicken with small, cooked shrimp. Add the cooked shrimp during the final mixing step with the pasta and sauce, as shrimp cooks very quickly and doesn’t require baking time beyond reheating.
- Chicken Spaghetti with Rotel Tomatoes: For many, this is the quintessential way to prepare this casserole, offering a slight kick and additional depth of flavor. Simply stir in a 10-ounce can of Rotel Diced Tomatoes (with green chilis) along with a separate small can of green chilis (drained) into the creamy sauce mixture.
- Spicy Kick: If you love heat, consider adding a pinch of red pepper flakes to the sauce, or finely diced jalapeños for a fresher spice.
- Herb Garden Freshness: Beyond parsley, experiment with other fresh herbs like chives, basil, or oregano for different aromatic profiles.
- Cheese Blend Adventure: Don’t limit yourself to just mozzarella. A combination of sharp cheddar, provolone, or even a smoked gouda could add intriguing layers of flavor to your cheesy topping.
- Mushroom Lover’s Delight: Sauté sliced mushrooms with a bit of onion before adding them to the sauce for an earthy depth.

Tips for Achieving the Best Baked Chicken Spaghetti
To ensure your Baked Chicken and Spaghetti Casserole turns out perfectly every time, keep these expert tips in mind:
- Al Dente Pasta is Key: Always cook your spaghetti (or chosen pasta) to al dente. Since it will continue to cook in the oven, slightly undercooked pasta prevents it from becoming mushy and helps it maintain a pleasant texture.
- Room Temperature Cream Cheese: For a silky-smooth sauce without lumps, make sure your cream cheese is softened to room temperature before adding it to the pot. This allows it to melt and incorporate effortlessly.
- Freshly Shredded Cheese: While pre-shredded cheese is convenient, it often contains anti-caking agents that can affect its melt. For the creamiest, most homogenous cheese sauce and topping, shred your own mozzarella and Parmesan from blocks.
- Don’t Overmix: Once you add the cooked spaghetti and chicken to the sauce, mix just enough to coat everything thoroughly. Overmixing can break down the pasta and make it starchy.
- Proper Sizing for Chicken: Cut your cooked chicken into uniform ½-inch chunks. This ensures even distribution throughout the casserole and makes each bite perfectly balanced.
- Season Generously: Taste your sauce before adding the pasta and adjust seasonings as needed. Don’t forget to season the pasta water too, as this adds a foundational layer of flavor to the spaghetti itself.
- Let it Rest: After baking, allow the casserole to rest for 5-10 minutes before serving. This brief pause allows the sauce to set, preventing it from being too runny and making it easier to scoop.
- Cover if Needed: If the top of your casserole is browning too quickly before the center is heated through, loosely tent it with aluminum foil during the last 10-15 minutes of baking.
Serving Suggestions for Chicken Spaghetti Casserole
This hearty Baked Chicken and Spaghetti is a complete meal on its own, but pairing it with a few simple sides can elevate your dining experience. Consider serving it alongside a crisp green salad with a light vinaigrette to balance the richness of the casserole. Garlic bread or crusty artisan bread is perfect for soaking up any extra creamy sauce. Steamed or roasted vegetables like green beans, asparagus, or broccoli make excellent companions, adding color and nutrients to your plate. For a festive touch, a glass of chilled white wine or a refreshing iced tea would complement this comforting dish beautifully.
Frequently Asked Questions About Chicken Spaghetti
Here are some common questions about making and enjoying your creamy Chicken Spaghetti Casserole:
Generally speaking, if stored properly in an airtight container in the refrigerator, rotisserie chicken should remain fresh and safe to eat for up to 3-4 days. Always ensure it has cooled completely before storing to prevent bacterial growth and maintain quality.
Absolutely! This casserole is excellent for meal prep. You can fully assemble the casserole, cover it tightly with plastic wrap or aluminum foil, and store it in the refrigerator for up to 24 hours before baking. When you’re ready to bake, remove it from the fridge and let it sit at room temperature for about 30 minutes while your oven preheats to 350°F (175°C). Then, bake as directed until bubbly and golden.
Yes, this recipe freezes beautifully, making it an ideal freezer meal. For best results, prepare and freeze the casserole in disposable foil baking dishes. You can assemble the dish completely (without baking), cover it tightly with plastic wrap and then foil, and freeze for up to 2 months. When you’re ready to enjoy, remove it from the freezer and let it thaw in the refrigerator overnight, or at room temperature for at least 30 minutes. Then, bake in a preheated 350°F (175°C) oven for 45 minutes to 1 hour, or until heated through and bubbly (note that baking from frozen will take longer than baking from thawed or fresh).

Storing and Reheating Your Chicken Spaghetti
Ensuring your delicious Chicken Spaghetti Casserole stays fresh and tastes just as good the next day is simple with these storage and reheating tips:
- Refrigerator: To store leftovers, allow the casserole to cool completely to room temperature. Then, cover the baking dish tightly with aluminum foil or transfer the leftovers to an airtight container. Store in the refrigerator for up to 3 days.
- Freezer (Unbaked): This dish is excellent for freezing before baking. Assemble the casserole in an oven-safe dish (disposable foil pans are great for this). Wrap it tightly first with plastic wrap, then with aluminum foil, ensuring no air can get in. Label with the date and freeze for up to 2 months.
- Freezer (Baked): If you have baked leftovers you wish to freeze, allow the casserole to cool completely. Divide it into individual portions or store in a larger freezer-safe container, wrapped tightly to prevent freezer burn. Freeze for up to 1-2 months.
- To Reheat (from Refrigerator): For refrigerated leftovers, cover the dish with aluminum foil and reheat in a preheated 350°F (175°C) oven for about 20-30 minutes, or until thoroughly heated through and bubbly. You can also microwave individual portions until hot.
- To Reheat (from Frozen – Unbaked): Remove the tightly wrapped casserole from the freezer. You can bake it directly from frozen, but it will take longer. Preheat your oven to 350°F (175°C). Remove the plastic wrap, but keep it covered with foil. Bake for 45 minutes to 1 hour, then remove the foil and bake for an additional 15-20 minutes, or until heated through and the cheese on top is melted and bubbly.
- To Reheat (from Frozen – Baked): Thaw frozen baked leftovers in the refrigerator overnight. Then, follow the instructions for reheating from the refrigerator. If reheating directly from frozen, cover and bake at 350°F (175°C) for a longer period (e.g., 45 minutes to 1 hour for a large portion), checking for thorough heating.

Chicken Spaghetti Bake Recipe
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Ingredients
- 1 pound spaghetti
- 2 cups chicken broth
- 8 ounces cream cheese
- 1 cup sour cream
- 1/2 teaspoon garlic powder
- 1/2 cup Parmesan cheese, shredded
- 2 cups cooked chicken, rotisserie or other, cut into 1/2″ chunks
- 2 cups mozzarella cheese, shredded
- 2 teaspoon Parsley, chopped for garnish
Instructions
- Preheat oven to 350 degrees F (175°C).
- Cook spaghetti noodles to al dente according to package instructions, drain and set aside.
- Meanwhile, in a large saucepan over medium heat, add the chicken broth, cream cheese, sour cream, and garlic powder. Bring to a low simmer and stir until all ingredients are combined and smooth.
- Remove from the heat, then add in the cooked spaghetti, Parmesan cheese, the diced chicken and half of the mozzarella cheese. Mix to combine, then spread into a greased 9″ x 13″ baking dish.
- Top with the remaining mozzarella cheese and bake in a preheated oven for 20-30 minutes, or until the cheese is melted and bubbly on top.
- Remove from the oven, garnish with fresh chopped parsley and serve hot. Enjoy!
Notes
Reheating: cover and reheat leftovers in a 350 degree oven for about 20 minutes. If you are baking from frozen, remove from the freezer for at least 30 minutes and then bake in a preheated 350 degree oven for 45 minutes – 1 hour.
Nutrition
Disclaimer: Nutritional values were calculated using a third-party tool and are provided as an estimation only.
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In conclusion, this Creamy Baked Chicken Spaghetti casserole is more than just a meal; it’s a testament to the comforting power of simple, wholesome ingredients. With its rich, cheesy sauce, tender chicken, and perfectly cooked spaghetti, it’s destined to become a staple in your rotation. Whether you need a quick and easy dinner, a comforting dish for a crowd, or a convenient freezer meal for busy times, this recipe delivers on all fronts. Dive in and savor every warm, delicious bite!
