2 3/4 cups all-purpose flour
2 teaspoons cream of tartar
1 teaspoon baking soda
1/2 teaspoon salt
1 cup unsalted butter, softened
1 1/2 cups granulated sugar
2 large eggs
1 teaspoon vanilla extract
1/4 cup granulated sugar
2 teaspoons ground cinnamon
Preheat oven to 375°F
Line baking sheets with parchment paper
Whisk flour, cream of tartar, baking soda, and salt
Cream butter and 1 1/2 cups sugar until light and fluffy
Beat in eggs one at a time
Mix in vanilla extract
Gradually add dry ingredients and mix until combined
Stir together 1/4 cup sugar and cinnamon
Shape dough into 1-inch balls
Roll each ball in cinnamon-sugar mixture
Place on baking sheets about 2 inches apart
Bake for 8 to 10 minutes
Cool on baking sheet for 2 minutes
Transfer to a wire rack to cool completely