Cocktail making video of world-famous bartender Hiroyasu Kayama, who was selected as The World's 50 Best Bars 2020. "Reproduce Campari without using Campari." 【Bar Benfiddich】 instagram / benfiddich_tokyo Twitter / @bar_benfiddich
The question mark powder is probably cinnamon. There's a video from 2016 making this cocktail and he used cinnamon powder in that one as well. It is interesting to see how this cocktail has progressed since then.