Step 1: Prepare the Flavorful Filling
Preheat your oven to 350°F (175°C). In a large mixing bowl, combine the shredded chicken, taco seasoning, salsa, undrained green chiles, rinsed black beans, thawed corn, diced jalapeños, and fresh cilantro. Mix until everything is evenly coated. Set aside.

Step 2: Create the Creamy, Spicy Cheese Sauce
In a separate medium bowl, combine the softened cream cheese, sour cream, cream of chicken soup, chicken broth, cumin, chili powder, and garlic powder. Use a hand mixer or a sturdy whisk to beat the mixture until it is completely smooth and well combined. This sauce is the magical binder that makes the casserole creamy and cohesive.

Step 3: Assemble the First Layer
Lightly spray a 9×13 inch baking dish with non-stick cooking spray. Spread about ½ cup of the creamy cheese sauce evenly over the bottom of the dish. This prevents sticking and adds moisture. Place a single layer of flour tortillas over the sauce, tearing them as needed to cover the bottom completely.

Step 4: The Hearty Filling Layer
Spoon half of the spicy chicken and bean mixture evenly over the tortilla layer.

Step 5: The Creamy Sauce Layer
Dollop half of the remaining creamy cheese sauce over the chicken layer, then use a spatula to spread it gently into an even layer.

Step 6: The Cheesy Glue
Sprinkle one-third of your shredded cheese blend (about 1 ⅓ cups) evenly over the creamy sauce.

Step 7: Repeat the Layers
Repeat the layers: another layer of tortillas, the remaining chicken mixture, the remaining creamy sauce, and another third of the cheese.

Step 8: The Final Tortilla and Crispy Top
Place one final layer of tortillas on top. Sprinkle the remaining third of the cheese evenly over everything. For an extra crunch, you can sprinkle the optional crushed tortilla chip and cheese mixture over the top.

Step 9: Bake to Bubbly, Golden Perfection
Cover the baking dish tightly with aluminum foil. Bake for 25 minutes. Then, carefully remove the foil and bake for an additional 15-20 minutes, or until the cheese is completely melted, bubbly, and the edges are lightly golden brown.

Step 10: Rest, Garnish, and Serve Fiesta-Style
Remove the casserole from the oven and let it rest for 10-15 minutes. This is crucial—it allows the layers to set, making it much easier to cut and serve cleanly. Present the casserole at the table alongside a vibrant array of all your fresh garnishes. Allow everyone to top their portion with their favorite fixings—shredded lettuce, tomatoes, avocado, a dollop of sour cream, and a squeeze of lime.