What side of greased proof paper do you use?

When using greaseproof paper, it typically doesn’t have a distinct "right" or "wrong" side, as it is designed to be non-stick on both sides. However, if the paper has a shiny side, that side is often more effective at repelling grease and moisture, so it’s best to place the shiny side facing the food. For most applications, either side can be used interchangeably, depending on personal preference.