This recipe shows you how to make chocolate cookies with pistachio ganache filling. First, make the cookie dough with butter, powdered sugar, egg whites, cake flour, and cocoa powder, then put it in a piping bag and pipe it out in the shape of roses or chocolate cookie shapes. Chill thoroughly in the refrigerator, bake, and then decorate with white chocolate, raspberry powder, and crushed pistachios. Sandwich the cookies with ganache made from pistachio paste and fresh cream, and wrap them beautifully. This is a cute and lovely sweet recipe that is perfect as a gift.