425g tin pitted black cherries, drained (see Recipe Tips)
100²µ/3½´Ç³ú morello cherry jam
100²µ/3½´Ç³ú plain flour
250g/9oz caster sugar
60²µ/2¼´Ç³ú cocoa powder
2 tbsp icing sugar
100²µ/3½´Ç³ú dark chocolate, to decorate
150²µ/5½´Ç³ú butter, melted and cooled, plus extra for greasing
500ml/18fl oz double cream
6 free-range eggs