Step 1

Preheat oven to 375 degrees F. Line a baking sheet with parchment paper or a silicone baking mat, or use a non-stick cookie sheet.

Step 2

In a medium bowl, whisk together the flour, cream of tartar, baking soda and salt. Set this aside.

Step 3

In a separate bowl, combine the butter and sugar. Beat with a mixer or paddle attachment in the stand mixer until the butter is smooth and the sugar is dissolved and no longer grainy. This should take at least 2 minutes.

Step 4

Add in the eggs and vanilla extract to the butter mixture, and beat until combined. Scrape down the sides of the bowl and add in the flour mixture. Beat again until a soft dough is formed.

Step 5

Combine the cinnamon sugar together in a small dish. Scoop the dough into medium balls, about 2 tbsp of dough, and roll in the cinnamon and sugar mixture. (I like to roll them twice)

Step 6

Place on the baking sheet about 2 inches apart and bake for 9 to 11 minutes. Let the cookies cool on the baking sheet out of the oven for about 5 minutes before transferring to a wire rack to cool completely. Enjoy!