Preheat your oven to 350°F (175°C).
In a large mixing bowl, combine the cooked shredded chicken, 1/2 cup of queso blanco cheese, black beans, corn, cumin, garlic powder, salt, and black pepper. Mix well until all ingredients are evenly combined.
Warm the corn tortillas in a skillet or microwave until pliable.
Spoon about 1/4 cup of the chicken mixture into each tortilla, roll them up tightly, and place them seam-side down in a greased 9x13 inch baking dish.
Pour the enchilada sauce evenly over the rolled tortillas, ensuring they are well covered.
Sprinkle the remaining 1/2 cup of queso blanco cheese on top of the enchiladas.
Bake in the preheated oven for 20-25 minutes, or until the cheese is melted and bubbly.
Remove from the oven and let cool for a few minutes. Serve hot, topped with sour cream and garnished with fresh cilantro.