Preheat oven to 375°F and line a cookie tray with parchment paper
In a medium bowl, whisk the flour, baking soda, cream of tartar and cinnamon together and set aside
In a stand mixer bowl, add butter and sugar. Attach the paddle attachment and beat for 4-5 minutes at medium speed until light and fluffy
Add eggs and beat until combined. Remove from stand mixer and whisk in vanilla
Fold in flour mixture until combined. Do not overmix
Using a large ice cream scooper, scoop out cookie dough balls and roll in the cinnamon/sugar mixture to coat completely
Transfer coated dough balls to parchment paper
Bake for 9-10 minutes or until the edges crisp up
Cool completely before eating
