1 cup (200g) sugar
½ cup (125ml) water
50g dark chocolate
Put the sugar and the water in a saucepan. Cook over a moderate heat until syrup reaches the thread stage . In another saucepan, melt the chocolate in a double boiler.
Once the chocolate has melted completely, pour in the syrup in a thin stream, stirring continuously until the coating sticks on to the spoon. While still hot, spread evenly over the cake.