A crust dessert is a type of dessert that has a pastry or cookie-like base. PIE, FLAN, and TORTE are all examples of crust desserts. PIE is a three letter word for a dessert that typically has a pastry crust and a filling of fruit, custard, or cream. FLAN is a four letter word for a dessert that is made with a custard base and a caramel glaze. TORTE is a five letter word for a dessert that is made with layers of cake and cream or jam.