My DD came home yesterday with a tin of her yummy shortbread. The cookies are nice and buttery and I think she bakes them in one sheet on a cookie sheet and then cuts them into bars.
2 cups butter, softened
1 cup sugar
1 tsp vanilla
4 cups flour
colored sugars, optional
Cream butter in a mixing bowl; gradually add sugar and beat well. Add vanilla and beat well. Gradually add flour, mixing until the dough forms a ball.
On a floured surface, roll dough to 1/2 inch thickness. Cut into 1 1/2 inch squares. Place on an ungreased baking sheet and sprinkle with colored sugars if using.
Bake at 325º for 14-18 minutes or until edges are lightly browned. Cool on wire racks.
Makes about 6 1/2 dozen cookies.