Mix mascarpone cheese and sugar until smooth.
Add egg yolks and stir well.
Quickly soak ladyfingers in espresso.
Lay soaked ladyfingers in a cake mold.
Spread the cheese cream over the ladyfingers.
Alternate layers of ladyfingers and cream.
Spread cream on top and dust with cocoa powder.
Let it chill in the refrigerator for at least 3 hours.