Reserve one-third of the coconut and put the rest in a large bowl. Add the flour, baking powder, sugar, eggs and melted butter. Mix together well until smooth.
Grease and line the base of 8 heart-shaped moulds, approximately 5 cm (2 inch) in diameter. Spoon the mixture into the moulds and bake in a preheated oven, 180°C (350°F), Gas Mark 4, for 20 minutes until the cakes are risen and a skewer inserted into the centre comes out clean. Turn on to a wire rack to cool, placing the rack over a baking sheet.
Melt the chocolate in a bowl over a pan of simmering water (see
Sprinkle over the reserved coconut to decorate and allow to set before serving.