Pour cake mixture into the prepared pan. Bake for 1 hour or until a skewer inserted in the centre comes out clean. Remove from oven and set aside for 30 minutes before turning on to a wire rack to cool completely.
Step 5
To make the chocolate ganache icing, place the chocolate and creme fraiche in a heatproof bowl over a saucepan of simmering water. Cook, stirring with a metal spoon, for 3-4 minutes or until chocolate melts and mixture is smooth.
Step 6
Use a large, serrated knife to split cake in half. Place bottom half on a serving dish. Spread half the ganache over the cake. Replace other cake half and spread remaining ganache over the top. Sprinkle with cachous to decorate. Set aside for 30 minutes to set. Cut into wedges to serve.