The BBQ sauce on this juicy grilled chicken is out-of-this world! We "wow" people with this recipe every summer during outdoor entertaining. I always double the sauce recipe to have extra on the side for dipping. The original recipe calls for 2 small boiler chickens quartered but we prefer using bone-in, skin on chicken breasts. Slow cooking on the grill gives it the best flavor. I hope you enjoy this as much as we do - it's a favorite at this house.