Although it sounds like child's food (and children do tend to like it), peanut butter pie is fundamental to the serious-dessert repertoire of the south. This creamy, peanutty pie is on the Blue Willow Inn dessert table every day, and customers have been known to fight over what appears to be the last piece. Usually, it isn't. When one pie gets down to its last couple of pieces, the kitchen has another to take its place.