For the water dough, put sifted flour into a mixing bowl. Sift in icing sugar and add margarine and corn oil or canola oil. Lift up the flour lightly, then rub in the margarine or oil. Gradually pour in water. Knead until a dough is formed, Form the dough into a ball. Leave aside for 10 minutes. Divide dough into equal portions of about 55g each.