I prefer it made with the "real stuff" as well - but this is an indulgance - and making it with the fake stuff allowed some friends who couldn't have the real stuff indulge.
But heffalumps aren't real anyway - at least outside the 100 acre wood.
Like the recipe I once saw for "chocolate Elaphant" (it was too big to be a moose) "Take a dozen eggs and two pounds of chocolate"