Tiramisu

Name: Tiramisu
Ingredients: 2 ½ cups (.6 l) freshly brewed espresso; ½ cup plus 1 tablespoon (100g plus 12g) sugar, divided; ¾ cup (.2 l) Tia Maria or other coffee liqueur; 4 large egg yolks; ½ cup (.12 l) dry marsala; 1 pound (450g) mascarpone; 1 cup (.25 l) chilled heavy cream; 36-40 savoiardi (crisp Italian ladyfingers); 7 ounces (200g) bittersweet or dark chocolate, grated; Unsweetened cocoa powder for dusting