Prep the base: Add the diced onion, minced garlic, diced tomatoes with juices, black beans, corn, and spices (cumin, smoked paprika, oregano) to the crockpot. Pour in the chicken broth.
Add the heat: Chop 1–3 chipotle peppers and stir them in, along with 1–2 tablespoons of adobo sauce. Start with less if you’re unsure, and adjust at the end.
Add the chicken: Nestle the chicken breasts or thighs into the liquid.
Season the top lightly with salt and pepper.
Slow cook: Cover and cook on Low for 6–7 hours or High for 3–4 hours, until the chicken is fully cooked and easily shreds.
Shred the chicken: Remove the chicken to a plate and shred with two forks. Return it to the crockpot and stir.
Finish the flavor: Squeeze in the juice of 1 lime. Taste and add more lime, salt, or pepper as needed.
For a creamier soup, stir in heavy cream, cream cheese, or coconut milk until smooth.
Serve with toppings: Ladle into bowls and top with cilantro, avocado, cheese, sour cream, tortilla strips, or jalapeños.