Hmm. There's a small variety of specs and techniques mentioned in this article... I stuck to the recipe above, using Founders Porter, Barrow's Ginger, and a homemade Jamaican demerara syrup... My lazy twist was to dry shake everything except the porter, then dump it all plus the porter into a saucepan to warm... Eh, I liked this. I'm intrigued by the extra flair of preparation, but my attempt was satisfying enough. (29 Feb 2024, 3:30p)