I’ve seen people suggest adding alcohol, but I think the idea is to simulate that Klingon coffee would have a sharpness or bite to it, rather than assuming that raktajino on the show would actually have alcohol. I played around with some recipes for fun and I actually mixed a few together and found something pretty delicious. I mix Turkish coffee, a small amount of whipped milk, cayenne pepper, cinnamon, and a little honey.
Frankly, the scene that introduced Stamets and Culber together I think was intended to surprise the audience in a different way –– Stamets is a huge jerk the previous few episodes and set up as a semi-antagonist, and that bit shows him in a very different light, as the audience/Burnham starts to thaw on the Discovery crew.
Raktajino... has liquor in it?
I like coffee. I like Star Trek....
When is season 4 anyway? (izzydata.xyz)