Pan di Spagna (Molise)

Pan di Spagna from Molise is a light sponge cake prepared with eggs, sugar, flour, a sprinkle of salt, and a leavening agent. There are many variations of the basic pan di Spagna recipe - this one starts with beating egg yolks with sugar, then gradually adding snowy eggwhites, flour, salt, and a leavening agent. Once baked, pan di Spagna is left to cool, then cut in two layers, soaked in liqueur, and filled with crema pasticciera. This refreshing cake is best enjoyed well chilled.