Take a mixing bowl and nestle it in a pan so that it sits a few centimetres above some gently simmering water. Put your chocolate in the bowl to melt.
While it’s melting, slice your parkin and apple. Layer your apple over the bottom slice of cake and, once the chocolate’s melted, add your scoops of ice cream.
Once the chocolate’s melted, dip a brush in it and flick it into thin strands over your ice cream. Brush the top layer of parkin with the remainder, stick it on top of the ice cream, tuck in!