陆 tsp bicarbonate of soda
125驳/4陆辞锄 soft dark brown sugar
125驳/4陆辞锄 buckwheat flour
25g/1oz cocoa powder, sieved
陆 tsp fine sea salt
1 tsp vanilla paste or extract
150驳/5陆辞锄 dark chocolate chips
125驳/4陆辞锄 dark chocolate (minimum 70% cocoa solids)
60g/2录oz soft unsalted butter
2 large free-range eggs, fridge-cold