De Ranke Back to Black
From the brewer:
“Back to Black is a dark brown, almost black, beer (9,5 % vol.alc.) that appeals to our imagination. Brewed with an IBU-bitterness of 100, the beer matures on foeder over a period of nine months before reaching it’s unique taste.
Taste: This wayward porter brings you the perfect balance between sour- and bitterness.”