There's this cake I loved at a cafe I used to go to as a child all the time. It was a chocolate cake, layered with black cherry jam, a black cherry flavored whipped cream (fresh whipped cream probably mixed with jam), and then all of that was covered in chocolate. The key that I'm trying to crack--I can easily recreate the rest of it--is this chocolate encasing. It was not a frosting or glaze, but rather a thin and pliable chocolate sheet that tasted of milk chocolate and draped over the small round cake. Any ideas how to make this last component?