Preheat oven to 400°
In a large mixing bowl, cream butter, shortening, 1 1/2 cups white sugar, eggs and vanilla using stand mixer or handheld mixer.
Blend in flour, cream of tartar, baking soda and salt to creamed mix, adding slowly.
In a separate smaller bowl, combine 1/2 cup white sugar and 1/2 cup cinnamon. Mix thoroughly.
Using a teaspoon, scoop out cookie dough and form into a ball shape by rolling dough between palms.
Dip and roll the dough ball in the cinnamon/sugar mix to thoroughly coat.
Place on baking sheet allowing room for cookies to spread while baking.
Bake 8-10 minutes.