An authentic Italian tiramisu is Tiramisu Italiano from the Food Network. This recipe calls for brewed espresso coffee, rum, marsala and ladyfingers along with cocoa powder, heavy cream, dark chocolate and mascarpone, an Italian cream cheese.
Start by beating together 7 egg yolks and 1/2 cup of sugar in a double boiler or a metal bowl placed over a pot of hot water. Whisk in 1/3 cup of sweet marsala, and continue cooking until the mixture thickens. Meanwhile, whip 1 cup of heavy cream into peaks in another bowl. After removing the bowl from the heat, add in 8 ounces of softened mascarpone cheese, and gently mix in the whipped cream.
Heat 1 cup of brewed espresso coffee, 1 ounce of dark chocolate, 1/4 cup of rum, 2 tablespoons of sweet marsala and 1 teaspoon of vanilla extract in a saucepan at low heat, stirring often. Once the chocolate melts, remove it from the heat. Dip 48 ladyfingers in the chocolate mixture, and layer them in a baking pan. Spread each layer of ladyfingers with the mascarpone mixture, topping it with the rest of the mascarpone cream. Finish by sprinkling the tiramisu with 1/4 cup of unsweetened cocoa powder, and chill it for a few hours before serving.