200g/7oz fresh blackberries (halved if large)
55g/2oz plain flour
225g/8oz plain flour
1陆 tsp bicarbonate of soda
175g/6oz caster sugar
40驳/1陆辞锄 demerara sugar
25g/1oz blanched hazelnuts, roughly chopped
pinch salt
1 tsp vanilla extract or paste
40驳/1陆辞锄 unsalted butter, melted
75g/2戮oz unsalted butter
3 free-range eggs
100ml/3陆fl oz full-fat milk
100ml/3陆fl oz buttermilk or soured cream