1/2 c. butter
1/2 c. shortening
1/2 c. brown sugar
1/2 c. granulated sugar
1 egg
1 tsp. vanilla extract
2 c. flour
1 tsp. baking soda
1 tsp. cream of tartar
1/2 tsp. salt

Cream butter, shortening and sugar; add other ingredients in order given. Roll into balls the size of walnuts and dip top half in cold water and then in granulated sugar.

Place on greased cookie sheet, sugar side up. Flatten with the bottom of a glass. Bake at 350 degrees for 10 to 12 minutes.