Step 1

Preheat oven to 350°F. Line two cookie sheet with silicone baking mats or parchment paper.

Step 2

Cream butter and sugar in the bowl of a stand mixer fitted with the paddle attachment (or a large bowl with a hand mixer). Cream until the mixture is fluffy, about one minute.

Step 3

Add the egg and vanilla and mix until smooth, then mix in baking soda, cream of tartar, and salt. Add flour and mix until cookie dough forms.

Step 4

Stir together sugar and cinnamon for coating in a small bowl.

Step 5

Scoop 2 tablespoon balls of cookie dough and roll between the palms of your hand. Roll in cinnamon sugar and place on cookie sheet, 2” apart.

Step 6

Bake for 10-13 minutes or until they are cracked on the tops and just lose the glossy sheen. Err on the side of under baked for best results.