Creamy Chicken Spaghetti Casserole Recipe

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If you’re craving a comforting, hearty dish that feels like a warm hug on a plate, this Creamy Chicken Spaghetti Casserole Recipe is exactly what you need. Combining tender shredded chicken, al dente spaghetti, and a luscious, cheesy sauce with just the right hint of spice from Rotel tomatoes and chili powder, this casserole delivers big on flavor and coziness. It’s a wonderful weeknight dinner that’s easy to prepare yet impressively satisfying, perfect for feeding a family or having delicious leftovers for days.

Ingredients You’ll Need

Every ingredient in this Creamy Chicken Spaghetti Casserole Recipe is simple but plays an essential role in creating the perfect balance of taste, texture, and color. From the sharp cheddar adding richness to the fresh vegetables giving vibrancy, each component has a purpose.

• 8 ounces uncooked spaghetti: The base that soaks up all the creamy sauce perfectly.
• 1 tablespoon olive oil: Adds a subtle fruity flavor and helps sauté the veggies.
• 1 tablespoon butter: Brings richness and a silky texture to the sauce.
• 1/2 medium onion (chopped finely): Offers a sweet, aromatic foundation for the casserole.
• 1/2 green or red bell pepper (chopped small): Adds a pop of color and a hint of crunch.
• 2-3 cloves garlic (minced): Enhances overall flavor with a warm, savory note.
• 2 tablespoons flour: Thickens the sauce to the perfect consistency.
• 1/2 cup chicken broth: Adds a mild, savory depth to the creamy base.
• 1 cup heavy/whipping cream: Creates the luscious, velvety texture that makes this dish so indulgent.
• 1 (10 fluid ounce) can Rotel Diced Tomatoes & Green Chilies (with juices): Brings a mild spicy kick and bright acidity.
• 1/2 tablespoon chili powder: Amplifies the warmth and complexity of spices.
• 2 cups shredded sharp cheddar (divided): The melty, tangy cheese that ties it all together.
• 2 cups shredded cooked chicken (rotisserie is perfect): Tender protein that turns this into a meal.
• Salt & pepper (to taste): Simple seasonings that enhance every flavor element.

How to Make Creamy Chicken Spaghetti Casserole Recipe

Step 1: Preheat and Prep

Start by heating your oven to 350°F and positioning the rack in the top third. This ensures a golden finish on your casserole later. While the oven warms, gather and prep all your ingredients so everything flows smoothly.

Step 2: Cook the Spaghetti

Boil salted water and cook the spaghetti for just one minute shy of the package instructions. This slight undercooking keeps the pasta firm enough to finish baking without getting mushy—a crucial step for perfect texture later.

Step 3: Prepare the Casserole Base

Drain the spaghetti well. Then, toss it into a generously greased 9×13-inch casserole dish. This will be the cozy bed where all the creamy goodness will come together.

Step 4: Sauté Aromatics

In a skillet over medium-high heat, warm your olive oil and butter until melted and shimmering. Add the chopped onions and bell peppers, sautéing for about 5 minutes until softened and fragrant. These veggies bring fresh flavor and build a savory foundation.

Step 5: Garlic and Roux

Add the minced garlic to the skillet, letting it cook for 30 seconds to release its aroma without burning. Then sprinkle in the flour, stirring constantly for a full minute to form a roux; this will thicken your sauce beautifully.

Step 6: Build the Creamy Sauce

Whisk in the chicken broth and heavy cream slowly, making sure no lumps remain. This silky mixture will coat every pasta strand with rich flavor. Stir in the Rotel tomatoes with their juices and the chili powder, allowing the sauce to cook and thicken slightly for 3 to 4 minutes. It should be creamy but still pourable.

Step 7: Cheese and Chicken

Turn off the heat and stir in half of the shredded sharp cheddar, letting it melt into the sauce. Then fold in your shredded chicken and season with salt and pepper to taste. This combination is the heart of the Creamy Chicken Spaghetti Casserole Recipe, making it hearty and irresistibly cheesy.

Step 8: Assemble and Bake

Pour the creamy chicken mixture over the cooked spaghetti in the casserole dish. Gently toss to coat every strand. Sprinkle the remaining cheddar cheese evenly on top, then cover with foil. Bake for 25 minutes to let all the flavors meld wonderfully.

Step 9: Finish with a Broil

Remove the foil and switch your oven to broil for a couple of minutes to brown and bubble the cheese topping. Keep a close eye to avoid burning, but this step adds a beautiful golden crust that makes the dish irresistible.

How to Serve Creamy Chicken Spaghetti Casserole Recipe

Garnishes

To elevate your Creamy Chicken Spaghetti Casserole Recipe even further, sprinkle freshly chopped parsley or green onions on top just before serving. A light dusting of smoked paprika or a few red pepper flakes can add a little extra pizzazz and color contrast, making each bite more exciting.

Side Dishes

This casserole pairs beautifully with crisp, refreshing sides to balance its richness. A simple green salad with a tangy vinaigrette, steamed broccoli with lemon, or garlic roasted green beans are all fantastic choices that add freshness and texture to your meal.

Creative Ways to Present

If you want to serve this at a gathering or family dinner, consider scooping the casserole into individual ramekins and topping with a small basil leaf or a dollop of sour cream for a charming presentation. Alternatively, serve it alongside warm garlic bread to soak up every last bit of creamy sauce.

Make Ahead and Storage

Storing Leftovers

Your Creamy Chicken Spaghetti Casserole Recipe keeps beautifully in the fridge for up to 3 days. Store leftovers in an airtight container to preserve moisture and flavors perfectly, making it easy to enjoy quick meals later in the week.

Freezing

This casserole freezes wonderfully, making it a convenient option for busy days. Portion it into freezer-safe containers and freeze for up to 3 months. When you’re ready, thaw it overnight in the fridge before reheating for best results.

Reheating

To bring leftover Creamy Chicken Spaghetti Casserole Recipe back to life, reheat gently in the oven at 350°F covered with foil to prevent drying out. You can also use a microwave on medium power, stirring halfway through to heat evenly and keep that creamy texture.

FAQs

Can I use a different type of pasta?

Absolutely! While spaghetti works beautifully in this recipe, you can substitute penne, rotini, or even egg noodles. Just adjust the cooking time slightly according to the pasta you choose to keep everything perfectly al dente.

Is rotisserie chicken necessary?

Rotisserie chicken is recommended for its convenience and flavor, but you can certainly use leftover cooked chicken or even poach your own. Just make sure the chicken is shredded finely for the best texture.

Can I make this dish vegetarian?

Yes! To make a vegetarian version, skip the chicken and use vegetable broth instead of chicken broth. Add extra vegetables like mushrooms or zucchini for more substance and flavor.

How spicy is this casserole?

The chili powder and Rotel tomatoes give just a mild warmth that complements the creamy sauce without overpowering it. If you like it spicier, feel free to add extra chili powder or some hot sauce to taste.

Can I use low-fat dairy options?

Using heavy cream really helps achieve the luscious texture that makes this dish special. While you can use lighter cream or milk, the sauce won’t be as rich. If you prefer, try half-and-half as a middle ground for a lighter but still creamy result.

Final Thoughts

There’s something undeniably comforting about this Creamy Chicken Spaghetti Casserole Recipe that makes it one of my all-time favorites to share with friends and family. It strikes the perfect balance between ease and flavor, delivering a dish that’s both satisfying and heartwarming. So go ahead, give it a try—you might just find your new go-to comfort meal that everyone will love as much as I do.

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