Preheat oven to 325°.

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 out 1/2 inch thick. Cut into 3×1 inch strips. Prick with fork and place on ungreased baking sheets.

Bake for 20 to 25 minutes.

Tip: Use an old, dark cookie sheet. New and shiny will not give them that very light brown color unless you increase the cooking time.