The TipNut blog occasionally digs up advice from really old cookbooks, and tips like this result: Spreading a thin layer of butter on a block of opened cheese keeps it soft, and prevents mould. The key is to get the butter lightly spread on the cheese you aren't serving yet, and to cover the end you exposed by cutting. It's a tip backed up by both recent how-to articles and really, really old cookbooks. If you don't like the idea of plebian butter infecting the taste of your aristocratic cheese choices, simply shave off the borders of your block before serving. Got your own advice for keeping the expensive fromage fresh? Tell us in the comments, and visit the link below for 25 more old-timey tips. Photo by cwbuecheler.