Leftover Belgian Stout Update

This interesting concoction (recipe in previous post) has a nice, creamy head with small bubbles and a beautiful cascade! The taste is very difficult to describe, although the roast is evident. Verging on sour, but not getting there, tart and refreshing. Not too thick, but neither is this a thin draft. Some residual sweetness, close to wine like with chocolate overtones. The nose is somewhere between vanilla and root beer-like---overall, I'd do this one again!