4cm/1陆in piece of fresh root fresh ginger, peeled, roughly chopped
陆 lemon, juice only
陆 lime, juice only
75驳/2陆辞锄 golden syrup
225g/8oz plain flour
录 tsp ground allspice
1 tsp baking powder
陆 tsp bicarbonate of soda
grind of black pepper
175g/6oz soft dark brown sugar
陆 tsp ground cardamom
75驳/2陆辞锄 caster sugar
1 rounded tsp ground cinnamon
1 small cinnamon stick
4 tsp ground ginger
125驳/4陆辞锄 icing sugar, sifted
录 tsp ground nutmeg
pinch salt
3 balls stem ginger in syrup, finely chopped, plus 2 tbsp ginger syrup from the jar
75驳/2陆辞锄 black treacle
150g/5陆oz unsalted butter, at room temperature, plus extra for greasing
3 free-range eggs, lightly beaten
4 tbsp dark rum
3 tbsp dark rum