For best results, use fresh, high-quality mascarpone cheese. Avoid refrigerated mascarpone that has been sitting for a long time, as it may be grainy.
If you prefer a stronger rum flavor, increase the amount of rum in the soaking liquid. You can also substitute dark rum with amaretto or brandy for a different flavor profile.
Ladyfingers vary in size. If your cookies are smaller, you may need more than 24 to create three complete layers. Adjust the quantity as needed to fit your dish.
This dessert is best served chilled. It can be prepared a day in advance and stored covered in the refrigerator.