Preheat your oven to 400°F.

Prepare a cookie sheet with a silicone baking mat or parchment paper.

In a medium bowl, combine flour, cream of tartar, baking soda, and salt. Set aside.

In a large mixer bowl, add the butter and 1 1/2 cups of sugar. Cream until light in color and fluffy, about 2-3 minutes.

Add the eggs one at a time, mixing well after each addition. Scrape down the sides of the bowl as needed.

Mix in the vanilla extract until incorporated.

Gradually add the dry ingredients to the wet mixture, mixing until just combined.

In a small bowl, mix the remaining 3 tablespoons of sugar with cinnamon.

Form tablespoon-sized balls of cookie dough and roll each ball in the cinnamon sugar mixture. Place them on the prepared cookie sheet, spaced about 2 inches apart.

Bake for 6-8 minutes.

Remove cookies from the oven and let them sit for 2-3 minutes before transferring to a cooling rack.