200g/7oz blackcurrant jam
陆-1 tsp black food colouring paste
80g/3oz plain flour, sifted
75驳/2陆辞锄 caster sugar, plus extra for sprinkling
70驳/2陆辞锄 icing sugar
225g/8oz icing sugar
75驳/2陆辞锄 self-raising flour
1 tsp liquorice essence
陆 tsp liquorice essence
70驳/2陆辞锄 unsalted butter, softened
75驳/2陆辞锄 butter, softened
3 large free-range eggs, at room temperature
2 free-range egg whites
1 tbsp milk