Combine beans, canned tomato, onion, chili peppers, corn, tomato sauce, cumin, chili powder and taco seasoning in a slow cooker. Place chicken on top and cover.
Cook on low for 10 hours or on high for 6 hours.
Half hour before serving, remove chicken and shred with a fork. Return chicken to slow cooker and stir in. Cook for 30 more minutes.
Serve with fresh cilantro, cheese and/or sour cream.
Notes
Spice: One teaspoon cumin and one teaspoon chili yields a less spicy chili. For more heat, increase both measurements to 1 1/2 teaspoons and add jalapeños.Store chili in an airtight container in the refrigerator for up to 4 days.Freeze chili in an airtight container for up to 4 months. Defrost in the refrigerator before reheating and serving.