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Cajun Chicken Spaghetti with Cheddar and Peppers

Category: Classic Southern Comfort Food Recipes

Cooked chicken and al dente spaghetti are mixed with condensed chicken soup, peppers and cheddar before baking. Cook the chicken fully before assembling the casserole. The soup is used undiluted, with a little reserved pasta water available only if the mixture needs loosening.
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Research and writing by A Pinch Of Lemon
Revised 2026-10-11 · Research-based; not kitchen-tested
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A plate of spicy southern cheesy chicken spaghetti casserole. Pin
A plate of spicy southern cheesy chicken spaghetti casserole. | apinchoflemon.com
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Cooked chicken and al dente spaghetti are mixed with condensed chicken soup, peppers and cheddar before baking. Cook the chicken fully before assembling the casserole. The soup is used undiluted, with a little reserved pasta water available only if the mixture needs loosening.

One option is to poach the breasts gently in water until their thickest parts reach 165°F, then shred on a clean board. This avoids relying on a dry pan when the ingredient list provides no frying fat. Separately cooked chicken can also be used, keeping its equivalent amount consistent.

Ingredient amounts and preparation

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  • Set out: 3 to 4 boneless, skinless chicken breasts (approximately 1.5 pounds)
  • Set out: 8 ounces dry spaghetti
  • Set out: 2 cups shredded sharp cheddar cheese
  • Set out: 1 cup chopped fresh bell peppers
  • Set out: 1 can (10.5 ounces) cream of chicken soup
  • Set out: 1 teaspoon paprika
  • Set out: 1/2 teaspoon cayenne pepper
  • Set out: 1 teaspoon garlic powder
  • Set out: 1/4 cup sliced green onions

Cooking sequence and doneness

Stage 1
Cook the chicken separately, for example by gently poaching in water until the thickest parts reach 165°F.
Stage 2
Rest briefly and shred on a clean board. Heat the oven to 350°F and lightly grease a casserole dish.
Stage 3
Boil spaghetti to al dente, reserve a little cooking water and drain. Finely chop the peppers and soften separately if a tender texture is preferred.
Stage 4
Mix the chicken, spaghetti, condensed soup, peppers, paprika, cayenne, garlic powder and one cup cheddar.
Stage 5
Loosen with a small splash of pasta water only if needed to coat the noodles. Spread evenly in the dish and add the remaining cup of cheddar.
Stage 6
Bake about twenty-five to thirty minutes, continuing until the center reaches 165°F. Rest five minutes and garnish with the green onions.
A plate of food with cheese and bacon on top.
A plate of food with cheese and bacon on top. | apinchoflemon.com
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Mix one cup into the chicken and spaghetti and reserve the other cup for the surface. The final oven stage melts both portions through the dish. Do not add all the cheese to the filling and then assume an extra unmeasured topping.

Should the pepper be cooked first?

Finely chopped pepper can soften in the bake, but a softer texture is easier to achieve by steaming or briefly softening it beforehand. Thick raw chunks may remain crisp. Keep the pieces small enough to distribute through the spaghetti. Reserve pasta water before draining and add a small splash only if the condensed soup mixture is too stiff to coat the noodles. Do not dilute the soup with a full can of water. Toss gently so the noodles do not break into a paste.

How much heat does the seasoning add?

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The half teaspoon of cayenne gives noticeable heat and can be reduced to preference. Taste the fully cooked filling before adding other seasoning. The soup and cheddar already contain salt, even though no extra salt is specified in the ingredient card.

Storage and serving later

Refrigerate perishable leftovers promptly in shallow containers at 40°F or below; do not wait for a large hot batch to cool completely on the counter. University of Illinois Extension’s leftover guidance gives a three-to-four-day refrigerated window and 165°F for reheating foods served hot. Keep cold salads and toppings chilled, and follow shorter product-label limits where applicable.

A bowl of food with bacon and cheese.
A bowl of food with bacon and cheese. | apinchoflemon.com
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For another complete recipe, see Creamy Angel Chicken Pasta with Baked Chicken Breasts or BBQ Ranch Chicken Pasta Casserole. Each has its own ingredient quantities and cooking sequence; keep those measurements separate when choosing a meal. USDA’s temperature guidance specifies 165°F for poultry, including ground chicken and turkey. Thermometer placement guidance explains checking the thick center rather than relying on surface color.

Common Questions About This Recipe

How can the chicken be cooked without sticking?

One option is to poach the breasts gently in water until their thickest parts reach 165°F, then shred on a clean board. This avoids relying on a dry pan when the ingredient list provides no frying fat.

How is the cheese divided?

Mix one cup into the chicken and spaghetti and reserve the other cup for the surface. The final oven stage melts both portions through the dish.

Should the pepper be cooked first?

Finely chopped pepper can soften in the bake, but a softer texture is easier to achieve by steaming or briefly softening it beforehand. Thick raw chunks may remain crisp.

What if the filling is difficult to mix?

Reserve pasta water before draining and add a small splash only if the condensed soup mixture is too stiff to coat the noodles. Do not dilute the soup with a full can of water.

How much heat does the seasoning add?

The half teaspoon of cayenne gives noticeable heat and can be reduced to preference. Taste the fully cooked filling before adding other seasoning.

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Cajun Chicken Spaghetti with Cheddar and Peppers

Cooked chicken and al dente spaghetti are mixed with condensed chicken soup, peppers and cheddar before baking. Cook the chicken fully before assembling the casserole. The soup is used undiluted, with a little reserved pasta water available only if the mixture needs loosening.

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Prep Time
25 min
Time to Cook
45–60 min
Complete Time
70–85 min
Research and writing: A Pinch Of Lemon

Recipe Type: Southern Comfort

Level of Difficulty: Moderate Difficulty

Cuisine Style: Southern American

Makes: 5 Number of Servings (One large casserole)

Dietary Categories: Check ingredient labels

Ingredients You’ll Need

→ Main Ingredients

01 3 to 4 boneless, skinless chicken breasts (approximately 1.5 pounds)
02 8 ounces dry spaghetti
03 2 cups shredded sharp cheddar cheese
04 1 cup chopped fresh bell peppers
05 1 can (10.5 ounces) cream of chicken soup
06 1 teaspoon paprika
07 1/2 teaspoon cayenne pepper
08 1 teaspoon garlic powder
09 1/4 cup sliced green onions

How to Make It

Step 01

Cook the chicken separately, for example by gently poaching in water until the thickest parts reach 165°F. Rest briefly and shred on a clean board.

Step 02

Heat the oven to 350°F and lightly grease a casserole dish. Boil spaghetti to al dente, reserve a little cooking water and drain.

Step 03

Finely chop the peppers and soften separately if a tender texture is preferred. Mix the chicken, spaghetti, condensed soup, peppers, paprika, cayenne, garlic powder and one cup cheddar.

Step 04

Loosen with a small splash of pasta water only if needed to coat the noodles. Spread evenly in the dish and add the remaining cup of cheddar.

Step 05

Bake about twenty-five to thirty minutes, continuing until the center reaches 165°F. Rest five minutes and garnish with the green onions.

Extra Suggestions

  1. One option is to poach the breasts gently in water until their thickest parts reach 165°F, then shred on a clean board.

Things You'll Need

  • Large pot
  • Casserole dish
  • Mixing bowl
  • Oven

Allergen Information

Always read labels for allergens and consult your doctor if unsure.
  • Contains milk, wheat, and possible gluten from pasta and soup.

Nutritional Breakdown (Per Serving)

This is for general info and isn't a replacement for professional advice.
  • Calories: Not calculated
  • Fat Content: Not calculated
  • Carbohydrates: Not calculated
  • Protein Content: Not calculated
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