Another option is to put them on the grill to get that extra caramelization. If you choose to use the grill, instead of placing them under the broiler in step 5, put them straight onto the grill (or onto a piece of aluminum foil) over high heat (500 degrees). Brush them with additional barbecue sauce and then close the lid. Let them grill for about 3-5 minutes, until the sauce starts to bubble and caramelize.