Now it turns out that goat's milk has been mentioned as an aside a few times here, here, and here, but there is no dedicated thread for goat milk.
Until now.
Anyway, what I found was this:
pre-steaming aroma: light, sweet, cake-like
pre-steaming flavor: mildly pungent and astringent (think goat cheese, duh!)
pre-steaming texture: thin
post-steaming aroma: dry
post-steaming flavor: dry, transparent, lacking sweetness
post-steaming texture: thin and silky
steaming technique notes: Goat's milk seems to naturally want to form a microfoam and does not seem to develop medium sized bubbles or volume as readily as cow's milk. Care must be taken not to over-steam since many of the usual endpoints seen with cow's milk (in terms of volumetric increase and alterations in foam density) are slightly blunted. However, the end result is a truly amazing microfoam that can make delicate satiny latte art and, to me, seems easily to manipulate than cow's milk.
flavor notes: Because it does not add sweetness to cappuccinos like cow's milk or soy milk, the flavors of the coffee come through with greater transparency in the cup. I would consider using goat's milk to blunt excessively sweet or rich espresso blends. I would avoid its use with darker roasts which might rely on the sweetness of the milk to balance the flavor palate.
I look forward to hearing other people's thoughts and experiences!




