Name: Chicken Fajita Casserole
Prep time: 10 min
Cook time: 40 min
Total time: 50 min
Yield: 12 servings
Cuisine: Mexican
Ingredients: 1 tbsp olive, avocado, vegetable or canola oil; 1 yellow onion; 3 bell peppers; 1 bag tortilla chips; 16 ounces cheddar cheese; 2 jars salsa verde or tomatillo salsa; 1 cup sour cream; 4 cups chicken; salt

Chicken fajita casserole combines tender chicken, sauteed onions and peppers, and tortilla chips for a simple satisfying meal. This Chicken Fajita Casserole is perfect for a bustling weeknight family dinner or stealing the spotlight at your next potluck gathering! This dish is a true crowd-pleaser by combining the deliciousness of flavorful chicken fajitas with crispy tortilla chips to make a casserole with a delightful crunch that’s irresistible!

Dinner

50 m

Mexican

Weelicious

March 15, 2026

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From the Cook

1/7

Chicken Fajita Casserole

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Ingredients

Warning0 allergens identified

Instructions

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Instructions

Preheat the oven to 350° F.

Heat the oil in a large skillet over medium heat. Add the onions and bell peppers along with 1 teaspoon of salt and sauté for 5-6 minutes, or until the vegetables just begin to soften. Remove from heat and allow the mixture to cool.

Take 12 ounces (about 3/4) of the tortilla chips and break them into smaller pieces.

In a large mixing bowl, combine the cooked onions and peppers, shredded chicken, salsa verde, sour cream, broken-up tortilla chips, and three-quarters of the shredded cheddar cheese. Mix everything together until well combined, ensuring that all the ingredients are evenly distributed.

Transfer the mixture to a 13 x 9-inch baking dish, spreading it out evenly to create a smooth surface. Cover the dish with aluminum foil to prevent the casserole from drying out during baking.

Bake covered for 35 minutes. Remove the foil and add the remaining tortilla chips and shredded cheddar cheese over the top of the casserole. Return the dish to the oven and bake for an additional 5-10 minutes, or until the cheese is melted and bubbly.

Remove from the oven and let cool for a few minutes. Garnish with sliced avocado, if desired, and serve hot, straight from the baking dish.

Nutrition

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Tips & Tricks (5)

Toast Tortilla Chips Last 🥔
Add tortilla chips only in the final 10-15 minutes of baking to maintain their crunch and prevent them from becoming soggy from the casserole's moisture.
Dry Your Chicken First 🍗
Pat chicken pieces dry with paper towels before sautéing to achieve better browning and develop deeper flavor through the Maillard reaction.
Char Your Peppers & Onions 🫑
Cook peppers and onions over medium-high heat without stirring for 3-4 minutes to develop caramelized edges and concentrated sweet flavors rather than steaming them.
Layer Strategy for Even Cooking 🧅
Create alternating layers of chicken mixture, cheese, and chips rather than mixing everything together, ensuring every bite has balanced texture and the top layer stays crispy.
Temper Your Sour Cream & Salsa 🥒
Mix sour cream with salsa off-heat and stir in a spoonful of warm chicken mixture to prevent curdling when combining with hot ingredients.