A dessert with a crust is a PIE, which is a three-letter word. Pies are a type of pastry dish that typically consists of a crust and a filling. The crust can be made from a variety of ingredients such as flour, butter, shortening, lard, or puff pastry. The filling can range from sweet to savory, and can include fruits, custards, creams, and meats. Pies are a popular dessert item and can be served warm or cold.