Prep Chicken: Place chicken breasts in the crockpot. Pour in half the enchilada sauce, season with spices, and cook on LOW for 6–7 hours or HIGH for 3–4 hours until tender.
Shred Chicken: Remove the chicken, shred it with two forks, and return it to the slow cooker.
Add Layers: Stir in black beans, corn, onion, and remaining enchilada sauce. Layer in tortillas and cheese.
Final Cook: Cover and cook for another 30 minutes to melt the cheese and blend flavors.
Serve Hot: Scoop into bowls and top with your favorite garnishes.