Preheat oven to 350°F.

Mix butter, sugar, eggs, and vanilla in large mixing bowl.

Combine flour, cream of tartar, baking soda and salt in separate bowl.

Blend dry ingredients into butter mixture.

Chill dough, and chill cookie sheet for 10 minutes in fridge.

Mix 3 tsp of sugar and 3 tsp of cinnamon in small bowl.

Roll 1 inch balls of dough into sugar/cinnamon mixture.

Place on chilled cookie sheet with parchment paper, and bake 10 minutes.