The classic combination of rum and raisins gives excellent results in these thin crisp biscuits. Delicious with a cup of tea or coffee, or served with vanilla ice cream.
Place the raisins in a small bowl, pour over the rum, cover with plastic wrap. Leave to soak for at least 1 hour. Preheat the oven to moderately hot 190°C (375°F/ Gas 5). Brush two baking trays with softened butter, then refrigerate until set. Brush the tray wit