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Creamy Rotel Chicken Spaghetti Casserole is one of those comforting meals that instantly brings everyone to the dinner table. Loaded with tender chicken, spaghetti pasta, creamy cheese sauce, and flavorful Rotel tomatoes with green chilies, this baked casserole is rich, hearty, and incredibly satisfying. It is the perfect recipe for busy weeknights, family gatherings, potlucks, or whenever you want a warm homemade meal that tastes like pure comfort.
This casserole combines the creaminess of melted cheese and cream soup with the slight kick of Rotel tomatoes, creating a balanced dish full of flavor. Using cooked chicken makes preparation simple and convenient, especially if you have leftover chicken or rotisserie chicken on hand. Once baked until bubbly and golden, every bite is creamy, cheesy, and delicious.
Serve this casserole with garlic bread, roasted vegetables, or a crisp green salad for a complete meal your family will request again and again.
Preparation Time
- Prep Time: 20 minutes
- Cook Time: 35 minutes
- Total Time: 55 minutes
Servings
Serves 6–8 people
Ingredients
- 12 ounces spaghetti
- 2 cups cooked chicken, shredded
- 1 can (10 ounces) Rotel diced tomatoes with green chilies
- 1 can (10.5 ounces) cream of chicken soup
- 1 package (8 ounces) cream cheese, softened
- 2 cups shredded cheddar cheese, divided
- 1 cup shredded mozzarella cheese
- 1 small onion, diced
- 3 garlic cloves, minced
- 2 tablespoons butter
- 1 cup chicken broth
- 1 teaspoon smoked paprika
- ½ teaspoon garlic powder
- ½ teaspoon onion powder
- ½ teaspoon black pepper
- ½ teaspoon salt
- ¼ teaspoon cayenne pepper (optional)
- 2 tablespoons chopped parsley for garnish
Instructions
Step 1: Cook the Spaghetti
Bring a large pot of salted water to a boil. Add the spaghetti and cook according to package directions until just al dente.
Since the pasta will continue cooking in the oven, avoid overcooking it.
Drain the spaghetti and set aside.
Step 2: Preheat the Oven
Preheat your oven to 350°F (175°C).
Lightly grease a 9×13-inch casserole dish with butter or cooking spray.
Step 3: Sauté the Onion and Garlic
In a large skillet or saucepan, melt the butter over medium heat.
Add the diced onion and cook for about 5 minutes until soft and translucent.
Stir in the garlic and cook for another 30 seconds until fragrant.
Step 4: Prepare the Creamy Sauce
Reduce the heat to low.
Add the softened cream cheese and stir until melted and smooth.
Mix in the cream of chicken soup and chicken broth. Stir continuously until fully combined.
Next, add the Rotel tomatoes with their juices. Stir in smoked paprika, garlic powder, onion powder, black pepper, salt, and cayenne pepper if desired.
Add 1½ cups of cheddar cheese and all the mozzarella cheese. Continue stirring until the cheese melts completely into the sauce.
The sauce should be smooth, creamy, and rich.
Step 5: Combine the Chicken and Pasta
Add the shredded chicken to the sauce mixture and stir until evenly coated.
Then add the cooked spaghetti. Using tongs or a large spoon, gently toss everything together until the pasta is completely covered in the creamy sauce.
Step 6: Assemble the Casserole
Transfer the spaghetti mixture into the prepared casserole dish.
Spread the mixture evenly.
Top with the remaining ½ cup cheddar cheese.
Step 7: Bake the Casserole
Place the casserole in the preheated oven and bake uncovered for 30–35 minutes.
The casserole is ready when the cheese is melted and bubbly around the edges.
For a golden brown cheesy crust, broil the casserole for 2–3 minutes at the end of baking.
Step 8: Garnish and Serve
Remove the casserole from the oven and allow it to rest for 5 minutes before serving.
Sprinkle fresh parsley over the top for added freshness and color.
Serve warm and enjoy.
Tips for Success
Use Rotisserie Chicken
Rotisserie chicken is convenient and adds extra flavor to the casserole. Leftover baked or grilled chicken also works very well.
Cook Pasta Properly
Cooking the spaghetti to al dente prevents it from becoming mushy during baking.
Soften the Cream Cheese
Allow the cream cheese to come to room temperature before cooking. This helps it melt smoothly into the sauce without lumps.
Customize the Spice Level
Use mild Rotel for a less spicy casserole or hot Rotel if you enjoy extra heat.
Delicious Variations
Add Vegetables
Bell peppers, mushrooms, spinach, or corn make excellent additions to this casserole.
Southwestern Twist
Add black beans, jalapeños, and taco seasoning for a Tex-Mex inspired version.
Crispy Topping
Top the casserole with crushed buttery crackers or breadcrumbs before baking for extra crunch.
Extra Creaminess
Mix in ½ cup sour cream or heavy cream for an even richer sauce.
Storage Instructions
Refrigerate
Store leftovers in an airtight container in the refrigerator for up to 4 days.
Freeze
This casserole freezes beautifully. Assemble it without baking, wrap tightly, and freeze for up to 3 months.
Thaw overnight in the refrigerator before baking.
Reheat
Reheat individual servings in the microwave or warm the entire casserole in the oven at 325°F until heated through.
Add a small splash of chicken broth or milk if needed to loosen the sauce.
Serving Suggestions
This casserole pairs wonderfully with:
- Garlic bread
- Caesar salad
- Roasted broccoli
- Green beans
- Cornbread
- Steamed vegetables
Creamy Rotel Chicken Spaghetti Casserole is the perfect balance of creamy, cheesy, savory, and slightly spicy flavors. The combination of tender chicken, rich cheese sauce, and baked spaghetti creates a comforting meal that feels homemade and satisfying. Whether you are preparing dinner for your family or bringing a dish to a gathering, this casserole is guaranteed to be a crowd-pleasing favorite every single time.
