Alcohol: Tiramisu can be prepared with or without alcohol, depending on your preference. This version uses coffee-flavored liqueur, which I find enhances the overall coffee taste, but you can also use alternatives like Marsala wine or brandy for a different depth of flavor.
Make-Ahead Instructions: Tiramisu actually improves in taste when made ahead of time, as it allows the layers and flavors to fully meld together. It can be stored in the refrigerator for 2 to 3 days before serving.
Freezing Instructions: You can assemble the tiramisu completely, but hold off on dusting it with cocoa powder. Wrap it tightly with plastic wrap followed by a layer of aluminum foil, and freeze for up to 3 months. When ready to serve, thaw it in the refrigerator overnight and dust the top with cocoa powder a few hours before serving for the freshest presentation.