Preheat oven to 350 degrees F and line baking sheet(s) with parchment paper.

In the bowl of an electric mixer fitted with a paddle attachment, mix together the butter, 1 cup of the sugar, and brown sugar on medium high speed until light and creamy. Add the eggs and beat to combine, scraping the bowl down as necessary.

In a separate bowl, combine the flour, cream of tartar, baking soda, salt, and 1/2 teaspoon of cinnamon. Add to the the stand mixer and mix on medium speed until combined.

Combine the remaining sugar and cinnamon in a small bowl. Roll the cookie dough into rounded tablespoons and roll in the cinnamon sugar. Place evenly on the prepared cookies sheets.