01 - Heat a large skillet over medium heat. Add ground beef and cook until browned, breaking apart with a spoon as it cooks. Drain excess fat and transfer to slow cooker.
02 - Add onion, bell peppers, garlic, diced tomatoes with juice, kidney beans, black beans, corn, chili powder, cumin, smoked paprika, oregano, cayenne, salt, black pepper, beef broth, and tomato paste to the slow cooker.
03 - Stir all ingredients until well combined and evenly distributed throughout the slow cooker.
04 - Cover and cook on low setting for 6-8 hours or on high setting for 3-4 hours until flavors have melded and vegetables are tender.
05 - Taste the chili and adjust salt, pepper, or cayenne as desired. Serve hot with optional toppings like shredded cheese, sour cream, chopped cilantro, or sliced jalapeños.