This recipe originally used shortening as the fat, but has been updated to use butter.[12] The chocolate chocolate chip cookie uses a dough that is chocolate flavored by the addition of cocoa or melted chocolate.[13] Variations on this cookie include replacing chocolate chips with white chocolate or peanut butter chips.[14][15] The macadamia chip cookie has macadamia nuts and white chocolate chips.[16] It is a signature cookie of Mrs. Fields bakeries. The chocolate chip peanut butter cookie replaces the vanilla flavored dough with a peanut butter flavored one. Chocolate chip cookie dough baked in a baking dish instead of a cookie sheet results in a chocolate chip bar cookie.