snickerdoodle

A snickerdoodle is a soft sugar cookie rolled in cinnamon sugar. It has a characteristically crackly surface, and can be crisp or soft, depending on preference. In modern recipes, the leavening agent is usually baking powder which, in baking, is most commonly used in cakes but not often in cookies. They traditionally contain cream of tartar. They're yummy. Google up a recipe and make some.