A chocolate chip cookie is a drop cookie that features chocolate chips or
chocolate morsels as its distinguishing ingredient. Chocolate chip cookies
originated in the United States in 1938, when Ruth Graves Wakefield
chopped up a Nestle semi-sweet chocolate bar and added the chopped
chocolate to a cookie recipe. Generally, the recipe starts with a dough
composed of flour, butter, both brown and white sugar, semi-sweet
chocolate chips, eggs, and vanilla. Variations on the recipe may add other
types of chocolate, as well as additional ingredients such as nuts or
oatmeal. There are also vegan versions with the necessary ingredient
substitutions, such as vegan chocolate chips, vegan margarine, and egg
substitutes. A chocolate chocolate chip cookie uses a dough flavored with
chocolate or cocoa powder, before chocolate chips are mixed in. These
variations of the recipe are also referred to as double or triple
chocolate chip cookies, depending on the combination of dough and
chocolate types.