Preheat oven to 350°F
In a large mixing bowl, beat together butter and 1 ½ cup sugar until well combined.
Add in eggs, one at a time until completely blended.
In a separate bowl, mix flour, cream of tartar, baking soda, and salt.
Add flour mixture to the butter mixture and mix until combined.
In a small bowl, combine ¼ cup sugar and cinnamon.
Shape dough into 1 to 1 ½ inch balls. Roll each ball in the cinnamon sugar mixture until the outside is thoroughly coated.
Bake for approximately 12 to 14 minutes.
Enjoy!!