This was a small 5.5″ diameter cake to feed 10 children. Dark Chocolate Mud Cake (from Planet Cake Cookbook) Ingredients for 5.5″ cake 80g  butter 80g  dark choc 10g  coffee 60ml  water 50g  SR 50g  plain 20g  cocoa 1/4 tsp  bicarb 180g  caster 1.5  eggs 3  tsp oil 40ml  buttermilk Dark Chocolate Ganache  450g dark chocolate,…