
This gooey spicy chicken spaghetti casserole is a crowd-pleaser at family gatherings and potlucks when you need both flavor and comfort. With melting cheddar and a little cayenne heat, it lands somewhere between a Southern baked dish and the easy weeknight meals I rely on for busy evenings. Whenever I bring this to the table bubbling hot with cheddar, everyone asks for seconds.
My family first tried this casserole one rainy Saturday the night before a big Sunday picnic. It was such a hit with friends that now it is always in rotation for our Sunday suppers or when someone requests comfort food with a little flair.
Ingredients
- Boneless skinless chicken breasts: Tender and hearty protein use the freshest organic if available for best texture
- Spaghetti: Provides a classic and satisfying base look for Italian brands for toothsome bite
- Sharp cheddar cheese: Packed with bold and creamy flavor always shred your own for superior melt
- Fresh bell peppers: Sweet and colorful choose firm peppers for crunch and vibrancy
- Canned cream of chicken soup: Turns everything creamy and rich opt for low sodium if you prefer
- Paprika: Smoky warmth adds a signature Southern note try smoked or Hungarian paprika for extra character
- Cayenne powder: Delivers the subtle lingering heat use less for milder palates
- Garlic powder: Infuses bold flavor in every bite choose garlic that smells fresh and sharp
- Green onions: For bright color and zesty finish use crisp stalks trimmed right before serving
Instructions
- Prepare and preheat:
- Set your oven to 350 degrees Fahrenheit Prepare a large casserole dish by coating it with oil or nonstick spray making sure all corners are covered to prevent sticking
- Cook the chicken:
- Place chicken breasts in a pot cover with water by an inch Bring to a gentle simmer and cook for 6 to 7 minutes per side until completely opaque and juices run clear Remove to a cutting board cool slightly then shred or chop into bite-sized pieces
- Boil the pasta:
- Fill a large pot with salted water bring to a rolling boil Add spaghetti breaking it in half if needed for easier stirring Cook until just al dente about 8 to 10 minutes Stir once or twice to prevent clumping Drain well and set aside
- Mix the casserole:
- In a large bowl combine shredded chicken cooked spaghetti drained bell peppers cream of chicken soup paprika cayenne and garlic powder Toss well so every strand is coated then fold in half of the cheddar cheese mixing to distribute evenly
- Fill the dish and bake:
- Transfer the combined mixture into your greased casserole dish pressing down gently so it is evenly layered Scatter the remaining cheddar cheese across the surface making sure corners and edges get cheese for crispy bites
- Bake and finish:
- Bake uncovered in the center of the oven for 25 to 30 minutes or until the casserole is bubbling around the edges and the cheese on top turns golden brown Remove from the oven and let it rest for at least 5 minutes before slicing
- Add the finishing touch:
- Sprinkle chopped green onions generously over the top right before serving for a punch of freshness and bright green color

There is something about sharp cheddar that keeps this casserole rich and comforting I still remember my aunt insisting on extra cheese every time we made it together She swore that made all the difference and she was absolutely right
Storage Tips
Store cooled leftovers in an airtight container in the fridge for up to four days To reheat cover with foil and warm gently in a 300 degree oven or microwave individual servings Add a splash of broth if the casserole seems dry and always scatter fresh onions on top for revived flavor
Ingredient Substitutions
Use rotisserie chicken for quicker assembly or swap in turkey for a new spin If you like a different cheese blend in Monterey Jack or Colby Jack Try adding roasted poblano for smokier flavor or mushrooms for a meatless twist
Serving Suggestions
This casserole pairs beautifully with a fresh green salad or buttery garlic bread When hosting I like to serve it with roasted broccoli or a plate of vinegared green beans for contrast
Cultural and Historical Notes
Spaghetti casseroles gained ground in Southern kitchens in the mid 1900s when cooks looked for easy hearty ways to stretch ingredients With the signature punch of cayenne and the classic cream soup this dish nods to tradition while remaining weeknight friendly
Seasonal Adaptations
Add sweet corn or fresh tomatoes in summer months Stir in sautéed spinach or kale in the fall for extra greens Layer sliced jalapeños on top for more spice during chili season
Success Stories
A friend of mine adapted this for a gluten free gathering by trading wheat spaghetti for a rice pasta and it was still polished off in no time Another time my neighbor added a splash of hot sauce and the potluck guests raved about it for weeks
Freezer Meal Conversion
Assemble the casserole right up to the baking step then wrap tightly and freeze for up to three months Bake straight from the freezer covered with foil until heated through then uncover for the last ten minutes to brown the cheese

Serve this casserole hot and bubbly for best results It is sure to disappear quickly at your table!
Common Recipe Questions
- → Can I use rotisserie chicken instead of cooking chicken breasts?
Yes, rotisserie chicken works well. Simply shred 1.5 lbs of cooked chicken and add it in place of the cooked chicken breasts.
- → What other cheese varieties can I substitute for sharp cheddar?
Monterey Jack, Colby, or a Mexican cheese blend also melt well and can provide great flavor variations.
- → How spicy is this casserole?
The combination of paprika and cayenne adds noticeable warmth, but you can reduce or omit cayenne for a milder dish.
- → Can this dish be made ahead of time?
Yes, assemble the casserole in advance and refrigerate. Bake when ready, adding 5-10 minutes to the baking time as needed.
- → What sides pair well with this casserole?
Try serving with a crisp green salad, roasted vegetables, or garlic bread to complement the rich flavors.