Creating your Green Chili Chicken Casserole is a breeze when you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Chicken: In a large mixing bowl, combine the cooked, shredded chicken with the drained green chilies.
3. Mix Ingredients: Add the cream of chicken soup, sour cream, garlic powder, onion powder, cumin, salt, and pepper to the bowl. Stir until well combined.
4. Layer the Casserole: In a greased 9×13 inch baking dish, spread half of the crushed tortilla chips evenly across the bottom.
5. Add Chicken Mixture: Spoon the chicken mixture over the tortilla chips, ensuring it’s evenly spread.
6. Top with Cheese: Sprinkle the shredded cheddar cheese generously over the chicken mixture.
7. Add Remaining Chips: Top with the remaining crushed tortilla chips for added crunch.
8. Bake: Place the casserole in the preheated oven and bake for 30-35 minutes or until the cheese is bubbly and golden brown.
9. Cool: Remove from the oven and let it cool for about 5-10 minutes before serving.
10. Garnish: Before serving, sprinkle with fresh cilantro if desired for a pop of color and flavor.

Following these steps will lead you to a deliciously satisfying Green Chili Chicken Casserole that will surely impress your family and friends.