200g/7oz raspberries
225g/8oz plain flour
25g/1oz cornflour
50²µ/1¾´Ç³ú icing sugar
200g/7oz icing sugar, plus extra for dusting
250g/9oz jam sugar
½ tsp vanilla extract
250g/9oz very soft unsalted butter
100g/3½oz unsalted butter, softened