Since (hopefully) everybody's obsession with mermaids is now over, fun-loving fantasy girls have a new mythical creature in tow: unicorns. No, apparently it's not just your three-year-old niece who is totally into them now. Foodies the world over have fallen in love with these rainbow, one-horned horse things and from macarons to cakes to hot chocolate, even we've got to admit they're magical.