What is it about mint that fairly shouts "Christmas!"? Maybe it's the fact that peppermint candy canes are so closely associated with the holidays. Or maybe it's the cool, "wintry" taste of peppermint. Whatever, peppermint is a flavor that seems to appear during the holidays and disappear just as quickly once the New Year's arrived. This recipe combines mint and chocolate in a dense, rich bar, made festive by a layer of white icing offset by a final drizzle of dark, bitter chocolate. If you...