3 All-Purpose Flour
Preheat oven to 375°F.
Mix the butter and sugar together until light and creamy.
Gradually work in the flour (Mixture will be crumbly.
Press mixture into a greased 9 x 13 pan.
Prick all over with a fork (Dip fork in some flour before pricking shortbread.
Sprinkle with a teaspoon of sugar (Optional.
Put into oven for about 20 minutes, or until pale golden.
When cool, cut into bars.