01 - Heat a large skillet over medium heat. Add the ground beef and cook, breaking it apart with a spoon, until browned and no longer pink. Drain excess fat and transfer to the slow cooker.
02 - Add the onion, bell peppers, garlic, diced tomatoes with juice, kidney beans, black beans, corn, chili powder, cumin, smoked paprika, oregano, cayenne, salt, pepper, beef broth, and tomato paste to the slow cooker. Stir thoroughly to combine all ingredients.
03 - Cover and cook on low setting for 6 to 8 hours, or on high for 3 to 4 hours, until flavors have melded and vegetables are tender.
04 - Taste the chili and adjust salt, pepper, or cayenne as desired. Serve hot with your choice of garnishes such as shredded cheese, sour cream, chopped cilantro, or sliced jalapeños.