Add the beef to a large soup pot and place over medium-high heat. Break the beef apart with a wooden spoon. Add the onion. Cook 6-8 minutes, stirring occasionally. Beef should be cooked through. Drain off any excess fat, if necessary.Add the garlic, chili powder, cumin, salt, black pepper, and cayenne pepper. Cook 1 minute, stirring often.Add the beans, tomatoes, tomato sauce, bourbon, and maple syrup. *If you like thinner chili, add up to 1 cup of water at this point. Stir well. Bring the liquid to a boil. Then, reduce the heat to low or medium-low. Simmer for 30 minutes, stirring occasionally.Let the chili rest for 5 minutes before serving.