Add chicken thighs, garlic, chili beans, black beans, corn, green chiles, diced tomatoes, and chicken broth to a 6-quart slow cooker. Sprinkle in all seasonings, including salt & pepper (start with 1/2 teaspoon each). Stir well.
Cover and cook on high for 2-1/2 to 3-1/2 hours or low for 3 to 5-1/2 hours, until chicken reaches 165°F and is tender enough to shred.
Remove chicken from the slow cooker, shred with two forks, then return it to the soup. Stir to combine. Taste and adjust seasonings as needed. Add fresh lime juice and cilantro if using.
Ladle soup into bowls and load up with toppings: Cheddar cheese, sour cream, diced avocado, and plenty of crushed tortilla chips.
Video
Notes
Note1: Chili beans are canned beans in a spiced tomato sauce that add instant flavor and richness to this soup.Note 2: I like to add 1/4 cup finely chopped fresh cilantro and 2 tablespoons fresh lime juice.Storage: Store in an airtight container in the fridge for 3–4 days or freeze (without toppings) for up to 3 months. Reheat on the stove or in the microwave.