- Preheat oven to 400 degrees F (200 degrees C).
- Cream together; butter, shortening, sugar, eggs and vanilla. Blend in the flour, cream of tartar, baking soda and salt. Shape dough by rounded spoonful into balls.
- Mix the 2 tablespoons sugar and the cinnamon. Roll balls of dough in mixture. Place 2 inches apart on ungreased baking sheets.
- Bake 8 to 10 minutes, or until set but not too hard. Remove immediately from baking sheets.