INGREDIENTS
•
1 tablespoon of butter
•
1 tablespoon of granulated sugar
•
1 heaping tablespoon of firmly packed dark brown sugar
•
Pinch of cream of tartar
•
Pinch of kosher salt
•
⅛ teaspoon of vanilla
•
Cinnamon
•
1 egg yolk
•
3 tablespoons of all-purpose flour