Lay the boneless, skinless chicken breasts in a single layer on the bottom of your slow cooker.
Sprinkle all of the dried onion, dried garlic, chili powder, cumin, smoked paprika, oregano, chipotle chili powder, salt, and pepper evenly over the chicken.
Add the black beans and corn.
Add the chicken broth (or chicken stock) and the can of red enchilada sauce right over the top. Give everything a gentle stir.
Cover the slow cooker. Cook on low heat for 6–7 hours or on high for 3–4 hours. The chicken is done when its internal temperature reaches 165°F and it’s tender.
Use tongs to remove the chicken to a cutting board. Shred it with two forks until it’s in bite-size pieces. Return the shredded chicken to the soup and stir. Remove the bay leaves.
Ladle the hot soup into bowls. Add your favorite toppings, such as tortilla strips, shredded cheese, a dollop of sour cream, diced avocado, or a squeeze of lime juice. Enjoy a big bowl of soup right away.