what are pies
Pies are defined by their crusts. A filled pie (also single-crust or bottom-crust), has pastry lining the baking dish, and the filling is placed on top of the pastry but left open.A top-crust pie has the filling in the bottom of the dish and is covered with a pastry or other covering before baking.ome of these pies are pies in name only, such as the Boston cream pie, which is a cake. Many fruit and berry pies are very similar, varying only the fruit used in filling.