Biscuit de Savoie sponge cake (Slideshow version)
Stage 6/9 : 5 min.
Gently fold in the flour, just until it is incorporated into the frothy egg mixture.This is the tricky part of the recipe. This needs to be done rapidly but gently to keep as much air as possible in the mixture. It is best to lean the bowl over on its side and use a soft spatula to lift and turn the mixture.