01 - In a large skillet over medium heat, cook the ground beef for 5 to 7 minutes until browned, breaking it apart with a spoon. Drain excess fat if necessary.
02 - Transfer the cooked ground beef into the slow cooker.
03 - Add the chopped onion, diced bell pepper, minced garlic, and minced jalapeño to the slow cooker.
04 - Pour in the kidney beans, black beans, crushed tomatoes, diced tomatoes with juice, and beef broth.
05 - Sprinkle the chili powder, cumin, smoked paprika, oregano, black pepper, salt, and cayenne pepper over the mixture. Stir well to combine all ingredients.
06 - Cover and cook on LOW for 6 to 8 hours or on HIGH for 3 to 4 hours, stirring occasionally if possible.
07 - Taste and adjust seasoning if needed. Serve hot, topped with cheddar cheese, sour cream, cilantro, and green onions as desired.