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Fajita Chicken Casserole Recipe

4.5 from 130 reviews

This Fajita Chicken Casserole combines the bold, smoky flavors of traditional fajitas with the comforting, cheesy goodness of a casserole. Tender chicken breast pieces are sautéed with onions and bell peppers, seasoned with a fajita spice mix, then baked in a creamy sour cream and chicken broth mixture, topped with melted cheddar and mozzarella cheese for a deliciously hearty meal that’s perfect for weeknight dinners or casual gatherings.

Ingredients

Scale

Chicken and Vegetables

  • 1 lb boneless, skinless chicken breasts, cut into bite-sized pieces
  • 1 large onion, sliced
  • 1 large bell pepper, sliced (any color)

Cheese and Dairy

  • 1 cup shredded cheddar cheese
  • 1 cup shredded mozzarella cheese
  • 1 cup sour cream

Seasonings and Liquids

  • 1 packet fajita seasoning mix (approximately 1 oz)
  • 1/2 cup chicken broth
  • 1 tbsp olive oil
  • Salt and pepper to taste

Garnish

  • Fresh cilantro, chopped (optional)

Instructions

  1. Prepare the Chicken: Heat the olive oil in a large skillet over medium-high heat. Add the bite-sized chicken pieces and season with salt and pepper. Cook, stirring occasionally, until the chicken is browned on all sides and cooked through, about 6-8 minutes.
  2. Sauté the Vegetables: Add the sliced onions and bell peppers to the skillet with the chicken. Cook for an additional 5 minutes, stirring occasionally, until the vegetables are tender but still slightly crisp.
  3. Add Seasoning: Sprinkle the fajita seasoning mix over the chicken and vegetables. Stir well to evenly coat everything with the spices.
  4. Combine with Liquids: Reduce the heat to medium-low. Stir in the sour cream and chicken broth, mixing until a creamy sauce forms and everything is well combined. Cook for another 2-3 minutes to heat through and allow the flavors to meld.
  5. Assemble the Casserole: Preheat your oven to 375°F (190°C). Transfer the chicken and vegetable mixture into a greased 9×9-inch casserole dish. Sprinkle the shredded cheddar and mozzarella cheeses evenly over the top.
  6. Bake: Place the casserole dish in the oven and bake uncovered for 15-20 minutes, or until the cheese is melted and bubbly with a slight golden crust.
  7. Garnish and Serve: Remove the casserole from the oven and let it rest for 5 minutes. Garnish with chopped fresh cilantro if desired. Serve hot and enjoy your flavorful fajita chicken casserole!

Notes

  • You can substitute the chicken breasts with boneless, skinless chicken thighs for a juicier dish.
  • If you prefer a spicier casserole, add a pinch of cayenne pepper or chopped jalapeños.
  • This casserole pairs well with a side of rice, tortillas, or a fresh green salad.
  • Leftovers can be stored in an airtight container in the refrigerator for up to 3 days.
  • To make it gluten-free, ensure the fajita seasoning mix does not contain gluten or use a certified gluten-free seasoning blend.

Keywords: fajita chicken casserole, chicken casserole, Tex-Mex casserole, cheesy chicken bake, easy dinner recipes