In a bowl, mix together flour, cream of tartar, baking soda, and salt together. Set aside.
In a small bowl, mix together the cinnamon and 3tbs of sugar. Set aside.
In the bowl of a stand mixer OR with a hand mixer, cream together sugar and butter.
Add the eggs one at a time.
Then mix in the vanilla and blend well.
Add the dry ingredients to the wet ingredients and mix until blended.
Shape the dough into 1 inch balls and roll in the cinnamon-sugar mixture.
Place 2 inches apart on an ungreased cookie sheet.
Bake for 8-10 minutes at 350 degrees.