Creating Mexican Chicken Casserole is a breeze if you follow these simple steps:

1. Preheat the Oven: Start by preheating your oven to 350°F (175°C).
2. Gather Ingredients: Prepare all your ingredients so they’re ready to go.
3. Mix Chicken and Beans: In a large bowl, combine the shredded chicken, black beans, diced tomatoes, corn, salsa, chili powder, cumin, garlic powder, salt, and black pepper. Stir well until all ingredients are evenly coated.
4. Layer the Casserole: In a greased 9×13-inch baking dish, spread half of the crushed tortilla chips evenly on the bottom. Then, add the chicken mixture on top of the chips and spread it evenly.
5. Add Cheese: Sprinkle 1 cup of shredded cheese over the chicken mixture, ensuring it covers the entire layer.
6. Finish Layering: Add the remaining crushed tortilla chips on top of the cheese layer, followed by the remaining cheese, ensuring a good cheesy topping.
7. Bake: Place the casserole in the preheated oven and bake for 30-35 minutes, or until the cheese is melted and bubbly.
8. Cool: Once removed from the oven, let it cool for 5-10 minutes to help it set before serving.
9. Garnish: If desired, sprinkle fresh cilantro over the top for a burst of color and flavor.
10. Serve: Cut into squares and serve warm, with a dollop of sour cream if desired.

These steps will help you create a scrumptious Mexican Chicken Casserole that is sure to impress everyone at the table!