It wasn’t until Rosie started asking for cupcakes like those she had seen in some of the new cake shops that sprang up a few years ago that we started decorating cupcakes with buttercream. The fashion today in cupcake shops is for topping cakes with a phenomenal amount of buttercream — often as much icing above as cake below, and most children do love buttercream topping. But although yummy, it is also very ric