PREPARATION:
- Prepare Zabaglione. Cover; refrigerate until well chilled.
- Beat cream and 2 tablespoons sugar in large bowl until soft peaks form. Gently fold in mascarpone cheese, then Zabaglione. (If Zabaglione has separated, beat until well mixed before folding into mascarpone.) Refrigerate 3 hours or until well chilled.
- Combine espresso, Cognac, remaining 2 tablespoons sugar and vanilla in small bowl. Layer 1/4 of ladyfingers in flower-petal design in 2-quart glass bowl with straight side or trifle dish. Generously brush ladyfingers with espresso mixture. Spoon 1/4 of chilled cheese mixture over ladyfingers to within 1 inch of side of bowl. Sprinkle with 1/4 of grated chocolate. Repeat layers 3 more times using remaining ladyfingers, espresso mixture, cheese mixture and grated chocolate. (For garnish, sprinkle remaining 1/4 of grated chocolate around edge of dessert, if desired.)
- Sift cocoa powder over top. Cover; refrigerate at least 30 minutes before serving. Garnish with edible flowers, if desired.
