This Christmas make my German Apple Mulled Wine & Sour Cream Cake - a light vanilla sponge with a rich and smooth sour cream filling and mulled stewed apples.
Separate eggs and beat the egg whites until stiff adding 75 g of sugar, 1 sachet of vanilla sugar and a pinch of salt. Stir in egg yolks. Mix the flour, cornstarch and baking powder. Sieve and stir in.