A pie is a sweet or savory dish with a crust and a filling. The sides of a pie dish or pan are slopedIt can have a just a bottom, just a top, or both a bottom and a top crust. A pie crust is traditionally made of flour, salt, cold water, and lard (or shortening) but many pie crust recipes use a combination of fats such as butter, lard, or vegetable shortening, or just butter. The goal is a crisp, flaky crust. Pies are served straight from the dish in which they were baked. A tart is a sweet or savory dish with shallow sides and only a bottom crust. Tart crusts are usually made from pastry dough: traditionally flour, unsalted butter, cold water, and sometimes sugar. The goal is a firm, crumbly crust. Tarts are baked in a pan with a removable bottom, or in pastry ring on top of a baking sheet so that it can be unmolded before serving.
