How to Roll a Sponge Cake
The key to a perfect sponge roll is to roll it immediately after baking so it holds its shape when filled.
Dust a large piece of non-stick baking paper with sugar. Turn the cake onto the paper. Remove the top sheet of paper from the cake.
Starting with the long side closest to you and using the paper as a guide, roll up the cake. Place, seam-side down, on a tray to cool.
Carefully unroll the cake and spread with the filling. Roll up to enclose the filling. Place in the fridge to chill until serving.