A chocolate chip cookie is a drop cookie from the United States. Small portions of the dough are "dropped" from a spoon onto a baking sheet, then baked 10-15 minutes in a medium oven until done. Main ingredients in the original recipe are flour, butter, eggs, salt, vanilla extract, both brown and white sugar, and chocolate chips. Variants feature nuts, oatmeal, etc. Chcoolate chip cookies can be made at home or purchased at bakeries and in stores.