M Smith
Google
So happy to find this. I got the cold 74% drinking chocolate with whole milk and it was even better than I expected! Not sweet -- don't expect typical "hot chocolate" flavor. They said the beans are from Ecuador. If you love dark chocolate (actual chocolate, not chocolate-flavored candy), you will be happy.
A heads up: Although they opened at 12, they had a sign stuck on the menu saying that they don't serve drinking chocolate until 1 pm. Not sure whether this is always the case, but if you're planning to get a drink, maybe plan on arriving an hour after they open.
Edit: Went back again recently shortly before closing, and drinks were sold out. So don't go too late!