Ingredients
Method
- Preheat oven to 375°F and line baking sheets with parchment.
- Whisk flour, cream of tartar, baking soda, and salt together.
- Beat butter and 1 1/2 cups sugar until fluffy, add eggs and vanilla, then stir in flour mixture.
- Mix 3 tablespoons sugar and cinnamon together in a small bowl.
- Roll dough into 1 1/2-inch balls and roll each ball in cinnamon sugar to coat.
- Place on prepared sheets 2 inches apart and bake 9-11 minutes until edges are just set.
- Cool on pan 5 minutes — they firm up as they cool.
