Black Boss Porter is a Baltic Porter from Browar Witnica in Poland, a sweet, dark ale with 9.4% alcohol by volume. I got it along with the Boss Beer from a restaurant that was out of business, and was pleasantly surprised at how good it was. (I had been a little concerned over the storage quality.)
Appearance: Dark brown, a little dirty motor oil-ish but a nice clear ruby-garnet when held up to direct sunlight.
Smell: Dark malts and a sweetness (creamy coffee), alcohol and black licorice.
Taste: Sweet and creamy rich over a slightly burnt, roasted grain character. Thickly sweet coffee, molasses, licorice, maple(?). I noticed the alcohol after it warmed up a bit in the glass.
Mouthfeel: Medium, somewhat lighter than expected for such a high-gravity beer; a bit syrupy.
Overall: Pretty good, I rather enjoyed it, though you have to be careful against the alcohol—you don’t really notice it.