Start by prepping the aromatics. Add the onions, garlic, chili powder, cumin, oregano, tomato paste, and olive oil in a medium microwave-safe bowl. Microwave for 5 minutes on high or until onions have softened and the mixture is fragrant.
Transfer the onion and garlic mixture to the slow cooker.
Stir in the beans, tomato sauce, beef broth, tapioca, Worcestershire sauce, chipotle chilis, brown sugar and bay leaf into the slow cooker. Stir until all of the ingredients are combined.
Season the chuck roast with salt and pepper and then stir into the slow cooker with the ingredients.
Tightly cover and cook on low for 9 – 11 hours or high for 6-7 hours.
Discard the bay leaf. Taste for salt and pepper.
Serve with favorite sour cream, chopped onions, avocado, cilantro, or your favorite chili condiments.