Using an electric mixer cream together the butter with the white sugar and brown sugar until it is light and fluffy. Add the egg and vanilla and beat until well incorporated.

Mix together the flour, cream of tarter, baking soda, salt, and cinnamon. Slowly add to the butter mixture until it is fully incorporated.

Mix together the sugar and cinnamon for rolling in a small bowl.

Scoop 1 1/2 Tablespoon balls of dough, I like to use my medium cookie scoop. Roll in the cinnamon sugar mixture and place on a baking tray.

Preheat oven to 375º F.

Bake for 10 minutes, the edges will be set and they will be puffy but have set.

Remove from the oven and let them cool for 10 minutes on the baking sheet before removing to a wire rack.