A sugar cookie is a cookie with main ingredients like sugar, flour, butter, eggs, vanilla, and either baking powder or baking soda. Sugar cookies may be formed by hand or rolled and cut into shapes. They are commonly decorated with icing, sprinkles, or a combination of both. Decorative shapes and figures can be cut into the spread dough using a cookie cutter. In North America, sugar cookies are popular during the holidays of Christmas, Halloween, Arbor Day, Groundhog Day, and Hanukkah.