Fill in the Blanks Scottish ShortbreadOnline version Instructions to making Scottish Shortbread. by Suzy Blue De Bruin 1 85g ready OVEN CUTTER FLOUR 3 BUTTER SUGAR BUTTER 40 To make Scottish Shortbread , first read the ingredients , then fill in the gaps . Ingredients : 85g icing sugar ( confectioner's sugar ) 85g castor sugar ( superfine sugar ) 280g butter 450g plain flour ( all purpose flour ) Method : Set oven to 280F - 140C ( Gas Mark 2 ) Cream the 280g of , the of icing sugar and 85g of castor together using a wooden spoon . Sift the 2 or times , then gradually mix into the creamed and sugar using your hands , until a firm dough is formed . On a lightly floured surface roll or press dough until about 1 / 2 inch thick and use a cookie to make shapes , or slice into 3 " x 1 " bars and prick the top with a fork . Bake in pre - heated for for approx 30 to mins , shortbread will be a light golden color when it's .