A chocolate cookie is a cookie in which the dough itself is flavored with cocoa powder or melted chocolate, distinct from a chocolate chip cookie, where a plain dough is studded with separate pieces of chocolate. The base dough is typically flour, sugar, butter, eggs, and cocoa powder or melted chocolate, sometimes with mix-ins such as chocolate chips, nuts, or dried fruit. Chocolate cookies range from soft and chewy to crisp, and crumbled cookies are also used as a pie or cheesecake crust, or as an ice cream topping.