Mix together flour, cream of tartar, baking soda, and salt together. Set aside.

Cream together sugar and butter. Add eggs and vanilla and blend well.

Add dry ingredients to wet ingredients and mix well.

Shape dough into balls and roll in the cinnamon-sugar mixture.

Place on baking sheet lined with baking paper.

Bake for 8-10 minutes at 180 degrees Celsius.

Enjoy!