I have to smile when recalling the episode of Blackadder Goes Forth, where Baldrick uses his dandruff as sugar, and offers to make an ersatz capuccino with...guess what?.. for a chocolate powder topping.
I really prefer instant coffee, Nescafe Gold Blend. The worst I've ever had was in Istambul, a tiny cup (fortunately) so bitter and strong it made my hair stand on end. They poured it from a great height from the pot, so it was frothy. I can still taste it now!