on the underside of the second cake, then sandwich the cakes together. serve, sprinkled with icing sugar.
take care when folding in the flour – you need to do it very gently.
when fresh raspberries and strawberries are out of season, use thawed frozen berries instead – or just leave them out.
once opened, a carton of two chicks free-range liquid egg white will keep in the refrigerator for 7 days. 