Mix onion powder, chili beans, black beans, corn, tomato sauce, broth, diced tomatoes, taco seasoning, cumin, chili powder, and shredded chicken in a slow cooker on low heat. Cover, and cook for 4 hours (or high for 1-2 hours).
Serve warm. Additional toppings may include cheddar cheese, sour cream, cilantro, and crushed tortilla chips.
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Notes
Stove top.Add soup ingredients to a stock pot. Simmer for 30 minutes until all ingredients are hot and well blended.Make a freezer meal. Mix all ingredients, except for the cheese and sour cream, and pour the uncooked soup into a freezer-safe container and freeze for 3-4 months. See How to Freeze Soup for tips.Store cooled leftovers in an airtight container, or individual-sized containers. Store in the refrigerator for 3-4 days or freeze for 2-3 months.