Preheat oven to 325 degrees F (165 degrees C).
Cream butter and brown sugar.
Add 3 to 3 3/4 cups flour. Mix well.
Sprinkle board with the remaining flour.
Knead for 5 minutes, adding enough flour to make a soft dough.
Roll to 1/2 inch thickness.
Cut into small shapes or thin strips.
Prick with fork and place on ungreased baking sheets.
Bake at 325 degrees F (165 degrees C) for 20 to 25 minutes.