This recipe comes from the writers of my all-time favorite cookbook, Veganomicon. It's everything you want in a frosting: fluffy, creamy, sweet (just rightly), and substantial enough that it stays put. Delicious on it's own and a great base to transform into other flavors as it suits you. I whipped it up in a food processor, as suggested in a review on the Post Punk Kitchen website, but I'll include here both sets of instructions, in case you've got a handy dandy electric mixer at your disposal. This version is slightly adapted from the original.