Sandwich cookies are a type of dessert consisting of two cookies with a filling in between. The filling can be made from various ingredients, such as cream, frosting, or jam. Popular examples include Oreo cookies, which feature a chocolate cookie with a sweet cream filling. These treats are often enjoyed as snacks or desserts and can be homemade or store-bought. They come in various flavors and styles, allowing for creativity in both the cookie and filling combinations. Sandwich cookies are a favorite among many and are commonly served at parties and gatherings.