An original silvana: a cold cookie consisting of "a layer of buttercream
sandwiched between two cashew-meringue wafers, coated with cookie
crumbs."  Really, it's just a dense cake with a thin layer of cream
inside.  As you bite, you hit cake, then a layer of crystallized cake
(due to the temperature of the cookie as a whole), then a layer of
cream.  The cookie has an interesting texture, but lacks much flavor.