In a large mixing bowl, beat the mascarpone cheese until smooth.
In a separate mixing bowl, beat the egg yolks and granulated sugar until pale and fluffy.
Add the wine to the egg yolk mixture and beat everything together.
Fold the egg yolk mixture into the mascarpone cheese until well combined.
Fold the whipped cream into the mascarpone mixture until it is well combined.
Dip each ladyfinger in the espresso or coffee and place them in a single layer in the bottom of a 9-inch square dish.
Spread half of the mascarpone mixture over the ladyfingers.
Dip the remaining ladyfingers in the espresso or coffee and place them in a single layer over the mascarpone mixture.
Spread the remaining mascarpone mixture over the ladyfingers.
Dust the top of the tiramisu with unsweetened cocoa powder.
Refrigerate the tiramisu for at least 2 hours before serving.