Recipes - Libationology

Ingredients

• 2 1/2 cups all purpose flour
• 1 teaspoon baking soda
• 2 teaspoons cream of tartar
• 1/2 teaspoon cinnamon
• ¼ teaspoon of salt
• 2 sticks (1 cup) unsalted butter
• 1¼ cup packed dark brown sugar
• 1/2 cup granulated sugar
• 1 large egg plus 1 egg yolk
• 1 teaspoons vanilla extract
• 1 tablespoon sour cream
• For rolling mixture:
• 1/4 cup sugar
• 2 teaspoons cinnamon