01 -
In a heatproof bowl, combine egg yolks and sugar. Place the bowl over a saucepan of simmering water, ensuring it does not touch the surface. Whisk constantly for 5–7 minutes until the mixture is pale, slightly thickened, and hot to touch. Remove from heat and allow to cool briefly.
02 -
In a separate large bowl, whip heavy cream until stiff peaks form. In another bowl, whisk mascarpone until smooth, then fold in the cooled egg yolk mixture. Gently fold in the whipped cream until fully combined. Refrigerate the cream mixture if it becomes too soft.
03 -
Pour cooled espresso into a shallow dish. Stir in coffee liqueur if using.
04 -
Quickly dip each ladyfinger into the coffee mixture for about 1 second per side. Do not soak to avoid sogginess.
05 -
Arrange half the dipped ladyfingers in a single layer in a rectangular glass dish. Spread half of the mascarpone cream evenly over the layer. Repeat with the remaining ladyfingers and cream.
06 -
Smooth the top, cover, and refrigerate for at least 6 hours or overnight for best results.
07 -
Before serving, dust generously with unsweetened cocoa powder. Slice cleanly and serve. Garnish with chocolate shavings or espresso beans if desired.