Whisk together the dry ingredients: the flour, cream of tartar, baking soda, ground cinnamon and salt until combined. Set aside.

In a separate mixing bowl with an electric mixer, cream together the butter, granulated sugar, and brown sugar for a few minutes until well combined. Mix in the eggs and vanilla extract until well combined. Scrape down the sides of the bowl as needed.

Add the dry ingredients to the wet ingredients and mix until combined. Cover bowl with plastic wrap and refrigerate for at least 30 minutes.

Preheat oven to 350°Line large baking sheet pans with parchment paper or silicone baking mats and set aside.

In a small mixing bowl, whisk together the 1/4 cup of sugar and 2 teaspoons ground cinnamon for the coating.

Remove the cookie dough from the refrigerator. Using cookie scoop or tablespoon, scoop the cookie dough out.

Roll each cookie dough into a ball, then coat in the cinnamon sugar mixture and place onto the baking sheets, spacing them apart for baking.

Bake at 350°F for 7-10 minutes or until the tops of the cookies are set. Remove from the oven and allow to cool on the baking sheet for 10 minutes longer covered with another piece of parchment paper and a hand towel to trap in the heat.