Peggy'S Shortbread
["12 oz. flour", "4 oz. sugar", "8 oz. butter", "caster sugar for sprinkling"]
["Sieve the flour and add the sugar.", "Rub in the butter and then work the mixture into a ball with a knife.", "Butter a baking tray and spread in the mixture.", "Bake in a preheated oven at 190\u00b0C (375\u00b0F) for 25 minutes or until browned.", "Remove from oven and cut into squares.", "Sprinkle with caster sugar."]
["flour", "sugar", "butter", "caster sugar"]