Preheat oven to 375oF and line a baking sheet with foil or parchment. In a medium size bowl, cream butter and sugar until butter is light and fluffy (mixing on a moderately high speed until blended). Stir in egg and vanilla. In a large bowl mix the flour, cream of tartar, and baking soda. Slowly add the wet ingredients and Craisins® to the dry ingredients and stir to combine dough. In a small shallow bowl mix cinnamon and sugar. Form a tablespoon of dough into a ball and roll into cinnamon sugar mixture. Place dough balls on an ungreased baking sheet 1-2 inches apart. Bake until light brown, 10-12 minutes. Let cool at least 5 minutes before transferring to cooling rack and enjoying.