Pour in the batter into a greased baking dish and bake at 350F for 25-30 minutes, until a toothpick inserted in the center ...

Remove from the heat and allow to cool for 5 minutes. Pour the warm cream over the melted chocolate and mix together until smooth and well combined. Stir in a pinch of salt. Line a roasting tray ...

Put the chestnut puree in a bowl and add the rum, butter, and melted chocolate. Mix thoroughly to combine, then pour into the pan or bowl. Cover with plastic wrap and refrigerate for at least 4 hours ...