Laurian

Hi everyone, I'm currently playing on a multiplayer server and I'm making quite a lot of mead, I've seen that there is 2 reciepes from this mod that I don't understand how to craft. It's the "Aged double mead portion" that transforms into the "Vintage double mead portion". I know how to make regular mead, strong mead and fine mead, but I don't know how to make those two other reciepes. Anyone got a hint for me ?