In a separate bowl, mix flour, cream of tartar, baking powder, and salt.
Mix the two bowls together.
Roll together and wrap in cling film.
Freeze for at least 10-15 minutes.
To cook: Heat oven to 350 degrees. Unwrap and slice off as many 1/2 inch disks as you feel like eating. Mix together 1 tablespoon sugar and 1 tablespoon cinnamon. Coat cookies with cinnamon sugar mix and bake for 10 minutes. Enjoy!