Bake Play Smile
Beat together the eggs and sugar over a double boiler. Remove from the heat and set aside to cool slightly. Add the mascarpone and vanilla and continue to beat on low speed until stiff.
Place the espresso coffee and the Kahlua into a bowl and set aside to cool. Working one at a time, dip each side of the lady finger sponges into the coffee mixture and then line them along the bottom of the dish.
Once you have lined the bottom of the dish with one layer of coffee-soaked ladyfingers, add half of the mascarpone custard mixture. Then, repeat. Finally, top with the remaining layer of mascarpone.
Cover and chill for at least 3 hours (but overnight is best!). When ready to serve, dust the top of the tiramisu with cocoa powder, using a sifter.