Cream together butter and sugar using a stand mixer or hand mixer, until it appears light and fluffy.
½ cup butter, ¾ cup sugar
Beat in egg.
1 egg
When egg is fully incorporated, beat in vanilla.
1½ teaspoon vanilla
Stir in cream of tartar, baking soda, salt, and cinnamon.
1 teaspoon cream of tartar, ½ teaspoon baking soda, ¼ teaspoon kosher salt, ½ teaspoon cinnamon
Add flour, ½ cup at a time. Wait until flour from each addition is incorporated before adding more.
1½ cups all purpose flour
Combine cinnamon and sugar in a small bowl.
2 tablespoon cinnamon, ¼ cup sugar
Using a cookie scoop or tablespoon, form cookies into balls. Roll each ball in the cinnamon sugar mixture, covering completely, and place on cookie sheet lined with parchment paper.
Bake for 10 minutes, or until cookies are set on top (if you check them and they seem jiggly on top, bake them for another minute or two.