A Pithivier (Pithiviers in French) is a round, enclosed pie usually made by baking two disks of puff pastry, with filling stuffed in between. It has the appearance of a hump and is traditionally decorated with spiral lines drawn from the top outwards with the point of a knife, and scalloping the edge.The filling is always placed as a lump in the middle of the bottom dough layer, rather than spread on it, because it would then liquefy and leak during baking.