I haven't many Swiss rolls, mainly a Chrsitmas, The Yule Log, and the recipe I follow I have to roll it up while it is still warm, unroll it when cool, add the filling and re roll. I have been looking at recipes today to make Macha Swiss Roll and Some recipes say to paper roll and some say to take out the tin, leave to cool and then add the filling and roll. Does anyone have experience ?
I have found it depends on the recipe you are using at the time, I have both prerolled and let cool and then rolled. I have had success and disasters in both.