YOU WILL NEED: 
250g good-quality milk chocolate, broken into pieces
3 punnets (450g) raspberries
2 tbs icing sugar
1/3 cup (80ml) Frangelico(optional)
4 eggs, separated, plus 1 extra eggwhite
125g caster sugar
250g mascarpone cheese
2 cups (250-450ml) strong black coffee
3 large sponges or savoiardi fingers
Cocoa powder, to dust
Place chocolate in a heatproof bowl over a pan of simmering water (don't let bowl touch the water) until chocolate melts, then remove bowl and stir chocolate until smooth. Cool slightly.
Set aside a quarter of raspberries, then place remainder in a bowl with icing sugar and 2 tbs frangelico (or similar - this is optional). Leave to macerate until needed.
Using electric beaters, beat egg yolks and caster sugar in a large bowl until pale and thick. Beat in the mascarpone, followed by the cooled chocolate. Using a clean bowl and beaters, beat eggwhites to stiff peaks, then fold into chocolate mix.
Place coffee in a dish and dip half the sponge fingers (or sponge cake) briefly in mixture, then layer in a cake tin or (if you use saviardi) then 2-litre (8-cup) dish, trimming to fit in a single layer. Spread half the chocolate mixture over sponge, then top with macerated berries. Dip remaining sponge in coffee mixture, then layer on top of berries, followed by remaining chocolate. Cover and chill for 4 hours.
Dust liberally with cocoa and garnish with reserved raspberries to serve.
