SERVES 6
3 whole eggs, at room temperature ½ cup (110g) caster sugar 1 tsp vanilla extract 250g mascarpone, at room temperature 1 cup black coffee, 2 Tbsp Frangelico or Kahlua, optional ¼ cup caramel dulce du leche (Caramel Treat), optional 200g (24–30) sponge finger biscuits Cocoa, for dusting