Preheat the Oven: Set your oven to 350℉.
Prepare the Filling: In a bowl, combine the chicken, 1 cup of cheese, green chiles, sour cream, salt, and pepper. Mix until well blended.
Prep the Baking Dish: Lightly spray a 9x13-inch baking dish with nonstick cooking spray.
Heat the Enchilada Sauce: In a small pot, bring the enchilada sauce to a boil over the stove.
Assemble the Enchiladas: Working one tortilla at a time, dip it into the hot enchilada sauce to coat. Add 2–3 tablespoons of the chicken mixture to the center of the tortilla, roll it tightly, and place it seam-side down in the prepared baking dish. Repeat until the dish is full.
Top and Bake: Pour the remaining enchilada sauce over the rolled tortillas, spreading evenly. Sprinkle the remaining cheese over the top.
Bake: Place the dish in the oven and bake for 25–30 minutes, until the cheese is melted and bubbly.
Serve: Remove from the oven and serve warm. Enjoy!