grease 2 oven trays,preheat oven to 180 celci

beat butter and icing sugar until light and creamy

sift flour cornflour coco baking powder into a bowl add to creamy mixture mix well

roll dough into small balls about the size of marbles and place on oven tray

flatten slightly with a fork bake for 20 min

transfer to wire racks when cool sandwhich 2 biscuites together with chocolate icing

to make icing place icing sugar,essence,coco,chocolate and butter in a bowl.add enough water to mix to speadable consistecy makes 16