What is "sandwich cookie"?

A sandwich cookie is a type of cookie that consists of two cookies that are sandwiched together with a filling. The cookies can be made from a variety of ingredients, such as butter, sugar, flour, and eggs, and can be flavored with different extracts, spices, or cocoa powder. The filling can also be made from a variety of ingredients, such as buttercream, ganache, jam, or frosting. Sandwich cookies are popular because they offer a variety of flavor combinations and can be decorated in many ways. They are also a great option for those who enjoy a sweet treat but don't want to indulge in a whole cookie. Sandwich cookies can be made in many shapes and sizes, from small bite-sized circles to larger rectangles. They are perfect for special occasions or everyday snacking and can be customized to suit individual tastes and preferences.