Preheat your oven to 400°F and prepare a cookie sheet with a baking mat or parchment paper.

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

In a large mixing bowl, cream together the butter and 1 1/2 cups of sugar until light and fluffy.

Add eggs one at a time, mixing well after each addition.

Mix in the vanilla extract.

Gradually stir in the dry ingredient mixture until well combined.

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

Roll tablespoon-sized balls of dough in the cinnamon-sugar mixture and place on the prepared cookie sheet, spaced 2 inches apart.

Bake for 6-8 minutes, until the edges are golden.

Let cool on the baking sheet for 2-3 minutes before transferring to a cooling rack.