Chicken Fajita Casserole

Isla Marie

Chicken Fajita Casserole

A hearty, cheesy casserole packed with tender chicken, sautéed bell peppers, and bold fajita seasoning. It’s savory, slightly spicy, and full of Tex-Mex flavor. Perfect for easy dinners, meal prep, or feeding a crowd.

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Prep Time 15

Cook Time 30

Total Time 45

Servings: 5

Course: Dinner, Main Course

Cuisine: Tex-Mex Inspired

Calories: 390

Ingredients Equipment Method Video Notes

Ingredients

Main Ingredients:

2 cups cooked or raw chicken sliced or cubed
1 tablespoon olive oil
1 tablespoon fajita seasoning or 1 packet
1 red bell pepper sliced
1 yellow bell pepper sliced
1 green bell pepper sliced
1 medium onion sliced
1½ cups shredded cheese cheddar or Mexican blend
Salt and black pepper to taste

Optional Add-ins:

½ cup sour cream or cream cheese
¼ teaspoon chili flakes
Fresh cilantro for garnish

Equipment

Baking dish (9x13 inch)
Mixing bowl
Spoon or spatula
Knife
Cutting board

Method

Step 1. Preheat Oven

Preheat oven to 375°F (190°C) and lightly grease a baking dish.

Step 2. Prepare Chicken

If using raw chicken, season with fajita seasoning, salt, and pepper.

Step 3. Mix Ingredients

In a large bowl, combine chicken, bell peppers, onion, olive oil, and seasoning. Toss until evenly coated.

Step 4. Assemble

Transfer mixture into the baking dish and spread evenly.

Step 5. Add Cheese

Sprinkle shredded cheese evenly over the top.

Step 6. Bake

Bake for 25–30 minutes, or until chicken is fully cooked and cheese is melted and bubbly.

Step 7. Rest

Let the casserole rest for 5 minutes before serving.

Step 8. Serve

Garnish with cilantro if desired and serve warm.

Video

Notes

Cut chicken and vegetables evenly for consistent cooking.
Do not overcrowd the dish to avoid excess moisture.
Add sour cream or cream cheese for a creamier texture.
Use pre-cooked chicken to reduce cooking time.
Adjust seasoning based on spice preference.