Preheat the oven to 350 and line the baking sheet with a silicone sheet, parchment paper, or coat with baking spray.
Using a mixer and a large bowl, blend butter until creamy.
Add the white and brown sugar to your bowl and mix well.
Mix in the vanilla extract and egg until well combined.
Add the flour, baking soda, salt and cream of tartar to your bowl. Mix thoroughly and set aside.
In a small bowl, prepare the cinnamon mixture that you will use to coat your cookie dough by combining the 1⁄4 c sugar with 2 tsp of cinnamon and mix well.
Next, using a tablespoon, scoop the cookie dough and form a ball using your hands.
Roll the ball in the cinnamon sugar mixture and place onto your baking sheet. Repeat to desired amount.
Bake in the oven for 12 minutes.
Allow the cookies to cool for 5 minutes on the baking sheet and transfer to a cooling rack to cool completely.
Enjoy!