Preheat oven to 375°F. Line three large baking sheets with parchment paper. Set aside.
In the bowl of a stand mixer fitted with the paddle attachment, cream together granulated sugar and butter on medium speed for 2-3 minutes. Add peanut butter and mix until combined.
Add eggs, one at a time, mixing until fully incorporated, stopping to scrape the sides of the bowl as needed. Mix in vanilla extract.
With the mixer on low, add flour, cream of tartar, baking soda, and salt. Mix until just combined. Set aside.
In a medium bowl, mix granulated sugar and cinnamon. Set aside.
Using a 2-tablespoon scoop, scoop out dough and roll each ball in the cinnamon sugar mixture to coat evenly.
Place coated dough balls onto the parchment-lined baking sheets, leaving about 2 inches of space between each cookie. Using your hand, flatten each cookie slightly.
Bake for 7-8 minutes, or until the edges are golden brown. Carefully remove from baking sheets and place on a cooling rack.