1 c. powdered sugar
1 c. white sugar
1 c. butter, softened
2 eggs
1 tsp. vanilla
4 c. and 2 tbsp. flour
1 tsp. salt
1 tsp. baking soda
1 tsp. cream of tartar

Cream sugar and eggs until fluffy. Add remaining ingredients, dry ingredients last. Flatten with glass dipped in sugar. Bake at 375 degrees for 10 minutes in an ungreased pan.