For a richer flavor, consider adding a tablespoon of cocoa powder to the chili. Adjust the amount of chipotle peppers and adobo sauce to your preferred level of spiciness. Remember that the chili will become spicier as it simmers. For a gourmet touch, use brioche hot dog buns and top with gourmet cheese such as pepper jack or smoked Gouda. If you want to add some sweetness, consider adding a tablespoon of brown sugar or maple syrup to the chili.