Cream butter, shortening, sugar, egg and vanilla.
Blend in flour, cream of tarter, baking soda, and salt.
Create balls of dough and roll in sugar and cinnamon.
Place on an un-greased baking sheet and bake cookies for 8-10 minutes at 400 degrees.
Lick off remaining dough and wait for cookies to bake!
Enjoy with a cup of milk!