Tiramisu Eggnog Trifle

INGREDIENTS

• 7 tablespoons Kahlúa or other coffee liqueur
• 4 8-ounce containers mascarpone cheese*
• 2 cups chilled whipping cream
• 4 tablespoons brandy
• 12 large egg yolks
• 1/2 teaspoon ground nutmeg
• 1 cup semisweet chocolate chips, finely ground in processor
• 1 1/4 cups water
• 1/4 cup plus 1 teaspoon dark rum
• 2 6.15-ounce or four 3.5-ounce boxes Champagne biscuits or Boudoirs (about 60 crisp ladyfinger cookies)*
• 1 1/3 cups plus 2 tablespoons sugar
• 6 1/2 teaspoons instant espresso powder
• 2 teaspoons vanilla extract