Could have been me - I've posted that a few times on HBT, it's part of my Triple Chocolate Imperial Honey Stout (a name to match its mouthfeel
) recipe. Go big or don't bother, I say!
For 5.5g hitting primary, I add 8 ounces of the lowest fat cocoa powder I can find at the end of the boil. I let the primary simmer for a couple of weeks, then rack it on top of 8 ounces of cacao nibs that have been soaked for a few days in just enough (cheap!) unflavored vodka to cover, giving the sealed container a shake any time I pass through the kitchen.
Then I let the secondary stew for another couple of weeks before kegging, and at that point I finally add a good ounce of Nielsen-Massey pure chocolate extract (the good stuff).
The result is a wonderful dessert beer. Imo it's even better than Young's draught Double Chocolate - which I love (and fwiw, what they sell in cans is horrible by comparison, imo).
It's the perfect "last pour of the evening", as the 9+% ABV inevitably kicks my arse right into bed
Cheers!
[edit] As for "how long", 2w in primary, 2w in secondary, 2w resting in the keg, and finally 2w carbing, before it hits my keezer. So eight weeks from boil to glass...