I went to Porto's this morning to get some muffins and of course some potato balls, but wanted some coffee too. I'm usually a non flavored, black coffee drinker, (i.e. double espresso, or coffee black) but I decided to try an OLD HAVANA ESPRESSO that they have there. It had a sweet and sour-ness to it, but still strong enough to be an espresso. What's in that? It was quite delicious. Anybody know?