Preheat oven to 350°F. Line baking sheets with silicone baking mats or parchment.
In a medium bowl, whisk together flour, cream of tartar, baking soda, and salt. Set aside.
In the bowl of a stand mixer fitted with the paddle attachment, beat sugar and butter on medium speed until light and fluffy, about 5 minutes.
Add eggs, one at a time, beating to incorporate completely before adding the next.
Add vanilla extract and beat in completely.
Add the flour mixture in two additions, mixing on low until just incorporated, about 15 seconds. Use a rubber spatula to ensure no unmixed flour remains at the bottom of the bowl.
In a small bowl, mix together sugar and cinnamon.
If possible, use a small ice cream scoop to portion out 1 1/2 tablespoons of dough and roll in cinnamon sugar mixture. Place on baking sheets leaving 2 inches of space between cookies.
Bake for about 17 minutes, rotating the sheets from top to bottom and front to back halfway through.
Let cookies cool on baking sheets for 4 minutes before transferring to a baking rack to cool completely.