100²µ/3Β½΄Η³ϊ raspberries
140g/5oz caster sugar
65²µ/2ΒΌ΄Η³ϊ cocoa powder
40²µ/1Β½΄Η³ϊ dark chocolate
butter, for greasing
200ml/7fl oz double cream
7 medium free-range eggs, separated