Brown the Beef:
Heat a skillet over medium heat and cook the ground beef until browned. Drain excess fat.
Combine Ingredients in Crockpot:
Transfer the cooked beef to the slow cooker. Add onion, bell pepper, garlic, beans, diced tomatoes, tomato paste, and beef broth.
Add Spices:
Stir in chili powder, cumin, smoked paprika, salt, and black pepper. Mix well to combine.
Cook Low and Slow:
Cover and cook on low for 6–8 hours or high for 3–4 hours, stirring occasionally.
Adjust Seasoning:
Taste the chili before serving and adjust salt, pepper, or spices as needed.