Set oven at 350 degrees. Grease or spray cookie sheets
Cream together butter and flour until light and fluffy. Add salt and continue beating.
Add flour alternately with sherry, beating well after each addition.
Stir in nuts. Drop by teaspoons on cookie sheets. Bake for 25 minutes being careful not to overbrown the cookies. Remove to a cooling rack. Keep in a sealed container. The flavor intensifies after the first day.