Add the Ingredients. In your slow cooker, combine the chicken breasts, diced tomatoes with green chilies, black beans, corn, diced onion, garlic, chicken broth, cumin, chili powder, salt, and pepper.
Cook Low and Slow. Set your slow cooker to low for 6-7 hours or high for 3-4 hours. The chicken will become tender, and the flavors will meld beautifully.
Shred the Chicken. Once the cooking time is up, remove the chicken breasts, shred them with two forks, and return them to the slow cooker.
Garnish and Serve. Ladle the soup into bowls and top with crispy tortilla strips, shredded cheese, sour cream, and fresh cilantro for an extra flavor punch.