Add the cocoa, flour ... it out to cover the top of the cake completely. To decorate, melt the white chocolate in a small bowl set over a saucepan of hot water. Spoon into a small piping bag ...
Melt the chocolate in a bowl suspended over a pan of hot ... and cocoa mixture. Pour the batter into the prepared tin and bake for 40 minutes, or until a skewer inserted into the cake comes ...