Cheesy Chicken Fajita Casserole Bake

This savory, cheesy Chicken Fajitas Casserole is a family favorite — an effortless way to enjoy deconstructed chicken fajitas baked into a creamy, cheesy casserole.

The casserole layers tender baked chicken with crisp bell peppers, sautéed onions, a creamy seasoned cheese mixture, and a blanket of melted cheddar. It’s a great weeknight solution when you want big Tex‑Mex flavors without the fuss of assembling individual fajitas.

Why You’ll Love This Chicken Fajitas Casserole

• Quick and convenient: Uses pre-cooked or rotisserie chicken and assembles in minutes.
• Baked, cheesy comfort: All the classic fajita flavors converted into an easy, oven-baked dish.
• Fresh ingredients: Bell peppers and onions add color, texture, and nutrition.

Recipe Ingredients

These simple ingredients yield a hearty, flavorful casserole. Adjust quantities as needed for your family size and taste.

• Baked chicken breasts, shredded (about 1 pound) — leftover roasted or store-bought rotisserie work well.
• Olive oil (1 tablespoon) for sautéing the vegetables.
• Red and green bell peppers, sliced into thin strips (one of each is suggested).
• Yellow onion, thinly sliced (or swap with white onion).
• Cream cheese (8 ounces), softened for a smooth, creamy base.
• Shredded cheddar cheese (8 ounces), divided — use your favorite shredded cheese if preferred.
• Fajita seasoning mix (about 1½ tablespoons) — homemade or store-bought.
• Salt and freshly ground black pepper, to taste.
• Fresh cilantro or parsley, chopped, for garnish.

How to Make Chicken Fajitas Casserole

This casserole comes together in a few straightforward steps: shred the chicken, sauté the peppers and onions, mix with a creamy seasoned cheese blend, bake, and garnish.

1. Preheat the oven: Heat to 350°F. Lightly grease a 9×13-inch baking dish.
2. Shred the chicken: Shred baked chicken breasts and place in a large mixing bowl.
3. Heat oil: Warm the olive oil in a skillet over medium-high heat.
4. Cook peppers and onions: Add the sliced peppers and onions, season with a pinch of salt, and sauté 4–5 minutes until softened. Remove from heat.
5. Make the creamy mixture: In a bowl combine softened cream cheese, half of the shredded cheddar, fajita seasoning, salt, and pepper. Mix until smooth.
6. Combine: Add the sautéed vegetables to the shredded chicken, then fold in the cream cheese mixture until evenly combined.
7. Assemble: Transfer the mixture to the prepared baking dish and sprinkle the remaining cheddar on top.
8. Bake: Bake 25–30 minutes, or until the casserole is hot, bubbly, and the cheese is melted.
9. Garnish and serve: Remove from the oven, sprinkle with chopped cilantro or parsley, and serve warm.

Serving Suggestions

This casserole pairs well with simple sides: steamed or sautéed green beans, a scoop of Mexican rice or garlic butter parmesan rice, or a crisp salad. You can also spoon the casserole into warm tortillas for tacos or use it as a filling for burritos and quesadillas. Finish the meal with a light dessert if desired.

How to Store and Reheat Leftovers

• Refrigerate leftovers in an airtight container for 3–4 days.
• Freeze for 1–2 months; thaw in the refrigerator before reheating.
• Reheat individual portions in the microwave or warm in a 350°F oven until heated through.

Mexican Inspired Chicken Recipes

• Chicken Quesadillas
• Taco Chicken Bites
• Instant Pot Chicken Burritos
• Chicken Chimichangas

Easy Casserole Recipes

• Broccoli Rice Casserole
• Chicken Parmesan Casserole
• Cheeseburger Casserole
• Cheesy Zucchini Squash Casserole