150²µ/5½´Ç³ú blueberries
50g/2oz blueberries
1 unwaxed lemon, zest and juice
1-2 tbsp lemon juice
½ tsp baking powder
225g/8oz caster sugar
300²µ/10½´Ç³ú icing sugar, sieved, plus extra for dusting
300²µ/10½´Ç³ú self-raising flour
125²µ/4½´Ç³ú butter, softened
50g/2oz butter, softened
200g/7oz cream cheese
2 free-range eggs
250g/9oz soured cream