Traditional Italian zabaglione is an authentic Italian dessert made up of heated egg yolks and sugar in bain-marie that's then whisked with marsala (sweet) wine until light pale and foamy. It can be chilled and served in a glass alongside biscuits and fruit. In a Tiramisu dessert, once made, the zabaglione is mixed with mascarpone cheese and whipped cream and then layered in a serving dish with coffee-soaked ladyfinger biscuits.