Buttermilk Banana Shakes

Look, I know buttermilk is sort of having a ‘foodie moment’ right now, that it might be the pork belly of 2012.  There are these buttermilk shakes; the blueberry buttermilk shakes on special at Duck Fat; buttermilk banana bread; a new cookbook devoted entirely to buttermilk; and, of course, buttermilk biscuits which are no passing [...]