300驳/10陆辞锄 blueberries, plus extra to serve
1 tsp baking powder
陆 tsp ground cinnamon (optional)
pinch of ground cinnamon
450g/1lb self-raising flour
4 tbsp maple syrup
small pinch salt
1 tsp vanilla extract, or seeds scraped from 1 vanilla pod
50驳/1戮辞锄 butter, melted, plus a small knob for frying
150驳/5陆辞锄 butter, softened
600ml/20fl oz buttermilk
3 large free-range eggs, separated