½ tsp orange extract
3 plums, halved, pitted and chopped
60²µ/2¼´Ç³ú caster sugar
1 tsp mixed spice
60²µ/2¼´Ç³ú self-raising flour
150g/5½oz plain chocolate
orange liqueur, such as Grand Marnier
1 tsp orange liqueur, such as Grand Marnier
20g/½oz unsalted butter
80g/2¾oz slightly salted butter, softened
2 large free-range eggs
1 large free-range egg white