Sure you can use both the expression and the cake to do both paper and fondant. BUT, only the Cake was tested by the FDA and approved for use with food. The expression never underwent that testing because it was never intended for that use so why would PC even consider that? Then when people began using it for cake decorating PC made the Cake to be food safe. Yes, people use one or the other for both. Their choice. Others choose not to. All for their own reasons. Personal choices. And that's all ok.