125²µ/4½´Ç³ú raspberries, plus a few extra to decorate (optional)
¼ tsp baking powder
175g/6oz golden caster sugar
75²µ/2¾´Ç³ú icing sugar
pinch salt
225g/8oz self-raising flour
1 tsp vanilla extract
75²µ/2¾´Ç³ú white chocolate, finely chopped
100²µ/3½´Ç³ú white chocolate
175g/6oz unsalted butter, softened, plus extra for greasing
250g/9oz cream cheese
3 medium free-range eggs
100²µ/3½´Ç³ú plain yoghurt