Preheat oven to 350 degrees.
In stand mixer, cream together the butter and sugar for about 5 minutes until fluffy. Add the egg and vanilla and mix to combine. It’s okay if it looks a little curdled.
In a medium bowl combine flour through cream of tartar. Turn mixer on low and add the dry ingredients.
Make walnut size balls of dough and roll them in the cinnamon sugar. Bake 6 to a pan for 10-13 minutes until golden on the sides.
Let cool and enjoy a classic. They’ll stay fresh for 3 days…if they last that long!