1 lemon, juice only
250g/9oz plain flour
陆 tsp bicarbonate of soda
8 cardamom pods
2 tsp ground cinnamon
1 tsp ground ginger
1 tbsp icing sugar
80g/2戮oz light muscovado sugar
2 tbsp black treacle or molasses
70驳/2陆辞锄 butter
1 free-range egg, yolk only
around 2 tbsp milk