Tiramisu

Directions

1. 1
   Heat 3/4 cup (175 ml) of the milk over low heat.
2. 2
   In a saucepan combine granulated sugar and cornstarch.
3. 3
   Add remaining 1/4 cup (60 ml) milk and the egg yolks.
4. 4
   Whisk until smooth.
5. 5
   Gradually stir in hot milk.
6. 6
   Cook and stir over medium heat until thick and bubbly; reduce heat.
7. 7
   Cook and stir 2 minutes more.
8. 8
   Stir in rum or brandy, butter, and vanilla.
9. 9
   Cover surface with plastic wrap; cool.
10. 10
    Refrigerate until cold, about 3 hours (mixture will be very thick).
11. 11
    Allow mascarpone to stand at room temperature for 30 minutes.
12. 12
    Stir mascarpone until smooth; fold in custard.
13. 13
    In a chilled small bowl, beat whipping cream just until stiff peaks form.
14. 14
    Fold into custard mixture.
15. 15
    In a small bowl dissolve coffee crystals in 3/4 cup (175 ml) water; add liquer.
16. 16
    Brush 12 Ladyfingers with half of coffee mixture.
17. 17
    Arrange in the bottom of a 2-qt.
18. 18
    square baking dish.
19. 19
    Spread half of the custard mixture on top and sprinkle with half of grated chocolate.
20. 20
    Repeat with remaining Ladyfingers, coffee, custard, and chocolate.
21. 21
    Cover; chill 8 hours or overnight.
22. 22
    To serve, sprinkle powdered sugar over top.