1/2 c. butter, softened
1/2 c. shortening, softened
1 1/2 c. sugar
2 eggs
2 3/4 c. flour
2 tsp. cream of tartar
1 tsp. baking soda
1/4 tsp. salt

Heat oven to 400 degrees. Mix all dry ingredients well and set aside. Cream shortening, butter, sugar and eggs. Add dry ingredients and mix well. Roll into balls the size of small walnuts. Mix 3 tablespoons of sugar and 3 tablespoons cinnamon and roll balls in this. Place 2 inches apart on ungreased cookie sheet. Bake 8 to 10 minutes.