This video shows you how to make chocolate butter sandwich cookies, perfect for Valentine's Day. The dough is based on sweet chocolate and unsalted butter, to which powdered sugar, egg yolks, cake flour, almond flour, and cocoa powder are added and mixed. The cookies are then cut into heart shapes and baked. The filling is a rich chocolate buttercream made by mixing melted chocolate and heavy cream, and then adding whipped unsalted butter. In addition, a smooth chocolate ganache made with warmed heavy cream, sweet chocolate, and unsalted butter is sandwiched in the center. The two types of chocolate cream are sandwiched between the baked cookies, chilled in the refrigerator until firm, and then beautifully wrapped to complete. This homemade treat conveys warmth and is sure to be appreciated at your own cafe or as a gift.