I made this for an office party and it was a big hit! No one could believe it was low fat! I did make my own variation, using the following substitutions:
brewed chocolate velvet coffee instead of instant, to which I added 2 Tbsp. Kahlua liqueur (great complimentary flavors that enhance the overall taste). I also used grated sugar-free dark chocolate in place of the cocoa, and put it on both layers.