A cookie is a small, flat-baked treat made from ingredients like milk, flour, sugar and eggs. There are different definitions of "cookie" and "biscuit" depending on the country. In the United States, a biscuit refers to a quick bread similar to a scone, while a cookie is a plain bun in Scotland. There are three main mixing methods for cookies - the one stage method, creaming method, and sponge method - as well as different types of cookies defined by their shaping technique, such as dropped, rolled, molded, or bar cookies.