A snickeroodle is a soft sugar cookie rolled in cinnamon sugar. It has a characteristically crackly surface, and can be crisp or soft, depending on preference, the distinctive and characteristic flavor of a snickerdoodle is provided by cream of tartar. They typically are easy to make. Some variants include nutmeg, raisins, chocolate chips, or nuts. In modern recipes, the leavening agent is usually baking powder which, in baking, is most commonly used in cakes but not often in cookies.