Cheesy Chicken Fajita Casserole Recipe

This Chicken Fajita Casserole takes all the bold, smoky flavors of classic fajitas and turns them into a simple, one-dish meal. Tender chicken, sautéed bell peppers, onions, and a mix of Mexican spices baked under a layer of melted cheese make this casserole perfect for weeknight dinners or meal prep.

Why You’ll Love This Recipe

• One-pan meal combining chicken, veggies, and cheese.
• Bold fajita seasoning for authentic flavor.
• Quick and easy prep for busy weeknights.
• Can be made ahead and reheated without losing flavor.
• Perfect for family dinners, meal prep, or potlucks.

Ingredients

• 1.5 lbs boneless, skinless chicken breasts, cut into 1-inch pieces
• 2 tablespoons olive oil
• 1 teaspoon chili powder
• 1 teaspoon cumin
• 1 teaspoon smoked paprika
• 1/2 teaspoon garlic powder
• 1/2 teaspoon onion powder
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1 large red bell pepper, sliced
• 1 large green bell pepper, sliced
• 1 large yellow bell pepper, sliced
• 1 medium onion, sliced
• 2 cups shredded Mexican blend cheese
• 1 cup cooked rice (optional for heartier casserole)
• 1/2 cup sour cream (optional topping)
• Fresh cilantro, for garnish

Step-by-Step Instructions

1. Preheat oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.
2. In a large skillet, heat olive oil over medium heat. Add chicken and sprinkle with chili powder, cumin, smoked paprika, garlic powder, onion powder, salt, and pepper. Cook 5–6 minutes until chicken is lightly browned.
3. Add bell peppers and onion to the skillet and sauté 3–4 minutes until slightly softened.
4. If using rice, stir in cooked rice to the skillet mixture.
5. Transfer the chicken and veggie mixture to the prepared baking dish. Sprinkle shredded cheese evenly over the top.
6. Bake for 15–20 minutes until cheese is melted and bubbly.
7. Garnish with sour cream and chopped cilantro before serving.

Tips & Variations

• Use rotisserie chicken for an even quicker version.
• Substitute chicken thighs for juicier meat.
• Add black beans or corn for extra protein and fiber.
• Use low-fat cheese or dairy-free cheese to lighten the dish.
• Top with avocado slices or jalapeños for extra flavor.

Storage & Freezer Instructions

• Store leftovers in an airtight container in the refrigerator for up to 3 days.
• Reheat in the oven at 350°F for 10–15 minutes or in the microwave until warmed through.
• Freezing: Assemble casserole without cheese, freeze in an airtight container for up to 2 months. Add cheese when baking from frozen.
• Do not refreeze leftovers after reheating.

Serving & Pairing Ideas

• Serve with tortilla chips or warm flour tortillas.
• Pair with a fresh green salad or Mexican-style slaw.
• Add a side of salsa, guacamole, or pico de gallo.
• Sprinkle extra cheese or fresh cilantro before serving for presentation.

Frequently Asked Questions

Can I make this casserole ahead of time?

Yes! Prepare the skillet mixture in advance, refrigerate, and add cheese right before baking.

Can I use frozen bell peppers?

Yes, but thaw and drain them to avoid excess water in the casserole.

Is this recipe low-carb?

Omit the rice or use cauliflower rice to make it low-carb.

Can I double the recipe?

Yes, use a 9×15-inch pan and increase baking time slightly until cheese is bubbly.

Ready to Make It?

This Chicken Fajita Casserole is an easy, flavorful, and cheesy one-pan meal that will become a family favorite. Perfect for weeknights, meal prep, or potlucks, it’s convenience and flavor all in one. Save this recipe and enjoy bold fajita flavors anytime.

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