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Bird's-eye view of chicken fajita casserole with bell peppers, onion, and melted cheddar cheese.

Chicken Fajita Casserole (Easy and Cheesy)

Baked chicken fajita casserole with bell peppers, onion, sour cream, cream cheese, and cheddar cheese.
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Prep Time 10 minutes
Cook Time 35 minutes
Total Time 45 minutes
Servings: 8 servings
Course: Main Course
Cuisine: Mexican
Calories: 400
Ingredients Method

Ingredients
  

  • 1 tablespoon olive oil
  • 6 boneless skinless chicken thighs or breasts, diced into bite-size chunks (4 to 6 ounces each)
  • 4 bell peppers, cut into strips (use a mix of colors for visual appeal)
  • 1 small onion, thinly sliced
  • 1 recipe or package fajita seasoning mix (taco seasoning is an acceptable substitute)
  • 1 cup sour cream
  • 4 ounces cream cheese brought to room temperature
  • 2 cups shredded cheddar cheese
  • optional garnishes: avocado, guacamole, sour cream, and salsa

Method
 

  1. Preheat Oven:

    Heat oven to 350°F (175°C).

  2. Cook Chicken:

    In a skillet over medium heat, cook the chicken in olive oil until fully done. Transfer to a plate and reserve.

  3. Sauté Onions and Peppers:

    In the same skillet, cook the onions and peppers until they reach your preferred tenderness.

  4. Combine Fajita Mixture:

    Return the chicken to the skillet, then add fajita seasoning, sour cream, and cream cheese. Stir until well combined.

  5. Bake with Cheese:

    Top with cheddar cheese and bake for 10 to 15 minutes, until the cheese is bubbly and melted.

  6. Serve with Toppings:

    Serve with optional toppings such as avocado, guacamole, sour cream, and salsa.