2 c. sugar
1/2 c. butter and 1/2 c. shortening or 1 c. butter
3 egg yolks
2 1/2 c. flour
1 tsp. baking soda
1 tsp. cream of tartar
1/2 tsp. vanilla or lemon flavoring

Mix well; mixture will be crumbly. Roll into small balls and roll in sugar. Bake at 350 degrees for 10 minutes on ungreased cookie sheet.