Combine flour and butter using a pastry cutter until the mixture resembles coarse sand.

Incorporate sugar and egg into the mixture.

Knead the dough by hand to form four equally sized, thick cakes.

Roll out one cake with a rolling pin to achieve a thickness of approximately 1/2 inch.

Cut the rolled dough into squares or rectangles.

Arrange the cookies on an ungreased cookie sheet.

Use a fork to prick each cookie.

Bake in a preheated oven at 300°F (150°C) for 30 minutes, or until lightly golden.