The chocolate cake with melted center @ Tarragon @ Elk Mountain Resort @ MTJ/TEX was outstanding. By far the best I've had of that style. Probably the richest cake I've ever had as well. Also surprisingly large and incredible value.

I'm also a fan of the chocolate truffle cake at Mccormick and Schmick's.
(the grocery store brand simply enjoy makes one that tastes almost the same ^^)

And high quality chocolate mousse. Best I've had so far was probably at a restaraunt in Rome near the Spanish steps. Spent hours dining outside, and had the mousse several times. Unfortunately I cannot remember the name or location of the restaraunt

Reminds me the best hot chocolate I have had was also in Rome, although I cannot remember where it was..

Truffle/mousse cake was 1 of my "6 foods in heaven"

edit - winner for strangest ad on FT - Tupac ad right now for this page