Creating Chicken Enchilada Rice Casserole is straightforward if you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Rice: If you haven’t done so, cook the rice according to package instructions.
3. Mix Ingredients: In a large bowl, combine the cooked rice, shredded chicken, enchilada sauce, black beans, corn, diced tomatoes, chili powder, cumin, garlic powder, onion powder, salt, and pepper. Mix well.
4. Layer in Casserole Dish: Lightly grease a 9×13-inch casserole dish. Pour the rice and chicken mixture into the dish and spread evenly.
5. Add Cheese: Sprinkle both the cheddar and Monterey Jack cheeses evenly over the top of the casserole.
6. Bake: Place in the preheated oven and bake for 30-35 minutes, or until the cheese is melted and bubbly.
7. Cool Slightly: Remove from the oven and let the casserole cool for about 5 minutes before serving to allow the cheese to set slightly.
8. Garnish: If desired, top with fresh cilantro before serving.

By following these simple steps, you’ll create a delicious and satisfying Chicken Enchilada Rice Casserole that is sure to become a new family favorite.