An apple tart is a baked dessert made from a pastry crust topped with sliced or pureed apples. Fillings range from thin, fanned apple slices to a thicker, custard-like apple mixture, often flavored with cinnamon, nutmeg, or vanilla. France's Tarte Tatin is a well-known variant made by caramelizing the apples in a skillet before baking them under a pastry lid and inverting the tart onto a plate. An apple tart differs from apple pie mainly in construction: a tart is open-faced in a shallow pan, while a pie is usually deeper and often double-crusted. Apple tarts are typically served warm or at room temperature, with whipped cream or vanilla ice cream.