Mix caster sugar with lemon juice, rind, sherry, and brandy.
Warm the mixture over a bain marie to dissolve the sugar.
Whip the double cream to soft peaks and fold into the liquid mixture.
Pour the cream mixture into tall glasses and allow it to rest.
Preheat the oven to 190°C and combine flour, baking soda, and spices.
Cream the sugar and butter together then beat in the egg and golden syrup.
Stir in the dry ingredients and spoon mounds onto a greased baking sheet 5cm apart.
Flatten the dough slightly, sprinkle with sugar, and bake for 8-10 minutes.