1/2 cup butter or margarine softened
1/2 cup shortening
1 1/2 cup sugar
2 3/4 cups flour
2 tsp. cream of tartar
1 tsp. baking soda
1/4 tsp. salt
Mix thoroughly butter, shortening, sugar and eggs. Blend in flour, cream of tartar, soda and salt. shape by rounded teaspoonfuls into balls.
Mix 2 TBS sugar and 2 tsp. cinnamon; roll cookie balls in mixture. Place on ungreased banking sheet. Bake at 400 for 8 to 10 minutes.