Beat mascarpone cheese about 1 min, using an electric mixer, in a large bowl. Then beat in cream, sugar and liqueur until just thickened, about 1 min. Divide pudding mixture evenly (about 1/3 cup each) among 8 ramekins or dessert dishes. Sift cocoa overtop. Serve with ladyfingers on the side.
Nutrition (per serving)
Prepare tiramisu a day ahead and refrigerate. Sift cocoa overtop just before serving.