The cake is iced in buttercream, airbrushed black, and topped it with a frozen buttercream transfer Harley Davidson logo. The bride and groom (hand-molded from modeling chocolate) are sitting on a plastic toy motorcycle. The flames are cut out of gum paste and airbrushed yellow, orange, and red. A tutorial for the frozen buttercream transfer can be found at melcakwalk[dot]blogspot[dot]com.