Preheat your oven to 350°F and spray a 9x13-inch baking dish with cooking spray.
In a large bowl, mix together the shredded chicken, 1 cup of enchilada sauce, green chiles, sour cream, 1 cup of cheese, cumin, garlic powder, salt, and pepper.
Spread ½ cup of enchilada sauce on the bottom of your prepared baking dish.
Layer half of the tortilla quarters over the sauce, then spread half of the chicken mixture on top. Sprinkle with ⅔ cup cheese.
Repeat the layers: remaining tortillas, remaining chicken mixture, and ⅔ cup cheese.
Pour the remaining enchilada sauce over the top and finish with the remaining cheese.
Cover with foil and bake for 25 minutes. Remove the foil and bake for an additional 10 minutes until the cheese is bubbly and golden.
Let it rest for 5 minutes before serving. Top with your favorite garnishes like cilantro, diced tomatoes, or avocado!