Make the cake Preheat the oven to 325°F ... Transfer the sugar to a medium heatproof bowl and whisk in the egg whites and salt. Set the bowl over a saucepan of simmering water and whisk gently ...

Grease a 20cm/8in cake tin with a little butter and line ... In a separate clean bowl, whisk the egg whites until still peaks form when the whisk is removed. Fold in the sugar.

Cover the cake with a clean tea towel and then leave in a cool place to dry for at least one day. To make the icing, lightly whisk the egg whites adding the sugar at intervals. Beat well until the ...