Unlock the Secrets to Mouthwatering Spicy Southern Chicken Spaghetti Casserole
Making an authentic, flavor-packed Spicy Southern Chicken Spaghetti Casserole takes a bit of technique, but I’m here to walk you through it step-by-step. With a few simple tricks, you’ll be whipping up this comforting casserole like a pro in no time. Let’s get started!
Gather Your Ingredients
Before we begin, let’s make sure you have all the necessary ingredients on hand: For the Chicken:- 2 lbs boneless, skinless chicken breasts
- 1 tbsp Cajun seasoning
- 1 tsp garlic powder
- 1 tsp onion powder
- 1/2 tsp cayenne pepper
- Salt and pepper to taste
- 1 lb spaghetti, cooked al dente according to package instructions
- 2 tbsp olive oil
- 1 onion, diced
- 1 bell pepper, diced
- 3 cloves garlic, minced
- 1 (15 oz) can diced tomatoes
- 1 (8 oz) can tomato sauce
- 1 cup chicken broth
- 2 tsp Cajun seasoning
- 1 tsp dried oregano
- 1 tsp dried basil
- 1/2 tsp red pepper flakes (or more, to taste)
- 1 cup shredded cheddar cheese
- 1/2 cup shredded Parmesan cheese
Season and Sear the Chicken
Begin by seasoning the chicken breasts all over with the Cajun seasoning, garlic powder, onion powder, cayenne, salt, and pepper. Heat a large skillet over medium-high heat and add a drizzle of olive oil. Once the oil is hot, add the seasoned chicken and sear for 3-4 minutes per side, until golden brown. Transfer the seared chicken to a cutting board and let it rest for 5 minutes before shredding or dicing it into bite-sized pieces. This extra step of searing the chicken first helps lock in the juices and infuses it with tons of flavor.Assemble the Casserole
Preheat your oven to 375°F. In the same skillet you used for the chicken, sauté the onion and bell pepper over medium heat until softened, about 5 minutes. Add the garlic and cook for 1 minute more, until fragrant. Pour in the diced tomatoes, tomato sauce, and chicken broth. Stir in the Cajun seasoning, oregano, basil, and red pepper flakes. Bring the mixture to a simmer. Add the cooked spaghetti and shredded chicken to the skillet, tossing everything together until well combined. Transfer the Spicy Southern Chicken Spaghetti mixture to a 9×13-inch baking dish. Top the casserole with the shredded cheddar and Parmesan cheeses, making sure to cover the entire surface.Bake to Perfection
Cover the baking dish with foil and bake for 20 minutes. Then, remove the foil and continue baking for an additional 10-15 minutes, until the cheese is melted and bubbly. Let the Spicy Southern Chicken Spaghetti Casserole rest for 5-10 minutes before serving. This allows the flavors to meld and the casserole to set up nicely.Serving Suggestions
This Spicy Southern Chicken Spaghetti Casserole is a complete meal in itself, but you can certainly serve it with some tasty sides to round out the dish. Here are a few ideas:- Garlic Bread or Dinner Rolls: To soak up all that delicious sauce.
- Steamed Broccoli or Roasted Asparagus: For a pop of color and extra veggies.
- A Fresh Green Salad: To balance out the richness of the casserole.
Storing and Reheating
Leftover Spicy Southern Chicken Spaghetti Casserole can be stored in an airtight container in the refrigerator for up to 4 days. To reheat, simply place a serving in the microwave for 1-2 minutes, or until heated through. You can also freeze individual portions for up to 3 months. When ready to enjoy, thaw the casserole in the refrigerator overnight and then reheat in the oven at 350°F until warmed through.Tips for the Best Spicy Southern Chicken Spaghetti Casserole
- Use a combination of Cajun seasoning and red pepper flakes to achieve the perfect level of heat. Adjust the amounts to suit your spice preference.
- Don’t overcook the spaghetti – you want it to be al dente so it holds up well in the casserole.
- Shredding the chicken instead of dicing it creates a more cohesive texture throughout the dish.
- Letting the casserole rest before serving allows the flavors to meld and the cheese to set up nicely.
What are the key ingredients needed to make the Spicy Southern Chicken Spaghetti Casserole?
The key ingredients needed to make the Spicy Southern Chicken Spaghetti Casserole include boneless, skinless chicken breasts, spaghetti, onion, bell pepper, garlic, diced tomatoes, tomato sauce, chicken broth, Cajun seasoning, oregano, basil, red pepper flakes, cheddar cheese, and Parmesan cheese.
How do you prepare the chicken for the casserole?
To prepare the chicken, you first season the chicken breasts with Cajun seasoning, garlic powder, onion powder, cayenne, salt, and pepper. Then, you sear the chicken in a skillet for 3-4 minutes per side until golden brown. After that, you let the chicken rest for 5 minutes before shredding or dicing it into bite-sized pieces.
How do you assemble and bake the Spicy Southern Chicken Spaghetti Casserole?
To assemble the casserole, you sauté the onion and bell pepper in the same skillet, then add the garlic, diced tomatoes, tomato sauce, and chicken broth. You stir in the Cajun seasoning, oregano, basil, and red pepper flakes. Then, you add the cooked spaghetti and shredded chicken, transfer the mixture to a baking dish, and top it with shredded cheddar and Parmesan cheese. You bake the casserole, covered, for 20 minutes, then remove the foil and bake for an additional 10-15 minutes until the cheese is melted and bubbly.
What are some serving suggestions for the Spicy Southern Chicken Spaghetti Casserole?
Some serving suggestions for the Spicy Southern Chicken Spaghetti Casserole include serving it with garlic bread or dinner rolls to soak up the delicious sauce, steamed broccoli or roasted asparagus for a pop of color and extra veggies, and a fresh green salad to balance out the richness of the casserole.

Spicy Southern Chicken Spaghetti Casserole
Ingredients
Equipment
Method
- Season the chicken breasts all over with the Cajun seasoning, garlic powder, onion powder, cayenne, salt, and pepper.
- Heat a large skillet over medium-high heat and add a drizzle of olive oil. Sear the seasoned chicken for 3-4 minutes per side, until golden brown.
- Transfer the seared chicken to a cutting board and let it rest for 5 minutes before shredding or dicing it into bite-sized pieces.
- Preheat your oven to 375°F.
- In the same skillet, sauté the onion and bell pepper over medium heat until softened, about 5 minutes. Add the garlic and cook for 1 minute more.
- Pour in the diced tomatoes, tomato sauce, and chicken broth. Stir in the Cajun seasoning, oregano, basil, and red pepper flakes. Bring the mixture to a simmer.
- Add the cooked spaghetti and shredded chicken to the skillet, tossing everything together until well combined.
- Transfer the Spicy Southern Chicken Spaghetti mixture to a 9×13-inch baking dish.
- Top the casserole with the shredded cheddar and Parmesan cheeses, making sure to cover the entire surface.
- Cover the baking dish with foil and bake for 20 minutes. Remove the foil and continue baking for an additional 10-15 minutes, until the cheese is melted and bubbly.
- Let the Spicy Southern Chicken Spaghetti Casserole rest for 5-10 minutes before serving.