Thats what i used. I'm going to try cocoa nibs next time, with maybe some really dark chocolate.
FWIW, side by side, my clone and the original irish death, are very similar, but there are slight differences between them. They look and smell identical, but the original has more chocolate flavor, while mine has faint hints of mildly roasted coffee (underneath the chocolate). The SWMBO prefered mine in a blind taste test, too! woot!