One cask was quaffed at the South Woodham Ferrers beer festival in Oct 2021, and bottles were available (but not for long) on the online shop. Cacao beans and coffee beans (ground by my fair hand of course) gave this stout, perhaps not unsurprisingly, a chocolatey and coffee-y flavour which was really rather nice. What the Aztecs would make of it I have absolutely no idea.
