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a serving of fajita chicken casserole on a plate.
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5 from 1 vote

Fajita Chicken Casserole

This Fajita Chicken Casserole is an easy and delicious dish packed with juicy chicken, vibrant bell peppers, and melted cheese. Perfect for busy weeknights, it’s versatile enough to serve with rice or wrap in tortillas for a classic fajita twist.
Prep Time15 minutes
Cook Time40 minutes
Total Time55 minutes
Course: Dinner
Cuisine: American, Mexican
Servings: 4
Calories: 563kcal
Author: Joanna Cismaru

Equipment

Ingredients

  • 4 chicken breasts boneless and skinless
  • 2 medium bell peppers green and red, thinly sliced
  • 1 large onion thinly sliced
  • 1 cup mozzarella cheese shredded
  • 1 cup cheddar cheese shredded
  • 2 tablespoons olive oil
  • 1 ounce fajita seasoning
  • fresh cilantro for garnish
US Customary - Metric

Instructions

  • Preheat your oven to 375°F (190°C). Lightly grease a 9x13 inch baking dish.
  • Pat the chicken dry with paper towels and season the chicken breasts with half fajita seasoning mix. Rub the fajita seasoning onto the chicken breasts until well coated. Arrange the seasoned chicken breasts in the bottom of the prepared baking dish.
  • Toss the sliced bell peppers and onions with olive oil and remaining fajita seasoning, then layer them over the chicken in the baking dish.
  • Sprinkle the shredded cheddar and mozzarella cheese evenly over the top of the peppers and onions.
  • Cover the baking dish with aluminum foil and bake in the preheated oven for 25 minutes. Then, remove the foil and continue to bake for another 10-15 minutes or until the chicken is cooked through (reaching an internal temperature of 165°F or 75°C) and the cheese is melted and bubbly. If you want to brown the cheese further, switch your oven to broil for the last 2-3 minutes of cooking, watching carefully to prevent burning.
  • Remove the casserole from the oven and let it sit for a few minutes before serving. Garnish with chopped cilantro or parsley and serve with lime wedges on the side.

Notes

  1. Pat the chicken dry to help the seasoning stick better.
  2. Shred your own cheese for smoother melting.
  3. To reduce spice, use a milder fajita seasoning or make your own blend.
  4. Let the casserole sit for a few minutes after baking to enhance the flavors.

Nutrition

Serving: 1serving | Calories: 563kcal | Carbohydrates: 12g | Protein: 62g | Fat: 29g | Saturated Fat: 11g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 11g | Trans Fat: 0.03g | Cholesterol: 195mg | Sodium: 1198mg | Potassium: 1060mg | Fiber: 3g | Sugar: 6g | Vitamin A: 3069IU | Vitamin C: 85mg | Calcium: 365mg | Iron: 2mg