Start by dicing your onion and mincing the garlic cloves. Drain and rinse your white beans and corn to remove excess sodium and liquid. Open the cans of diced green chilies and chicken broth so everything is ready to go.
Place the chicken breasts at the bottom of the crockpot. Add the diced onion, minced garlic, drained white beans, corn, and diced green chilies on top.
Pour in the chicken broth and sprinkle the cumin, chili powder, salt, and black pepper evenly over the ingredients.
Cover your crockpot with the lid and cook on low for about 6-7 hours, or on high for 3-4 hours, until the chicken is tender and shreds easily.
Remove the chicken breasts and shred them with two forks. Return the shredded chicken to the crockpot and stir everything together.
Add the shredded cheddar cheese and sour cream to the crockpot and stir until melted and creamy.
Ladle the chili into bowls and top with chopped green onions for a burst of freshness. Serve with your favorite sides or enjoy on its own.