In a medium sized mixing bowl, stir together flour, baking soda, cream of tartar, and salt. Set aside.

In the base of a stand mixer, beat together butter and and sugar until creamed together.

With the mixer going, add one egg at a time, until combined. Once the eggs have been included, add the vanilla and the oil, beat until combined.

With the mixer going on low, spoon the flour mixture into the mixing bowl, until completely combined.

Pour the batter into a Tupperware and freeze at least an hour, if not over night.

Pre heat the oven to 350°F.

Spoon sugar cookie dough on a piece of parchment paper, roll and cut into desired shape.

Bake for 10 minutes. Remove and allow to cool.