Cream together butter and sugar using a stand mixer or hand mixer, until it appears light and fluffy.
Beat in egg.
When egg is fully incorporated, beat in vanilla.
Stir in cream of tartar, baking soda, salt, and cinnamon.
Add flour, ½ cup at a time. Wait until flour from each addition is incorporated before adding more.
Combine cinnamon and sugar in a small bowl.
Grease two cookie sheets.
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.
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.