Ganache, a smooth mixture of chocolate and cream, is one of the richest, most delicious of all chocolate frostings. The frosting is made in the same manner as the chocolate ganache glaze, ( opposite), and then allowed to thicken until the frosting is spreadable. Achieving the perfect consistency can be tricky; if the frosting becomes too firm to spread; reheat in a bowl over a pan of simmering water until it begins to melt around the edges, then remove from heat and stir until smooth.