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 plain greek yogurt
For rolling mixture:
1/4 cup sugar
2 teaspoons cinnamon