30g/1oz soft brown sugar
1 tsp vanilla bean paste
300g/10陆oz bourbon cream biscuits
400g/14oz 70% dark chocolate, broken into pieces
100g/3陆oz mini marshmallows
115g/4oz salted butter, cut into cubes
50g/1戮oz salted butter, cut into cubes
whipped cream, to serve (optional)
350ml/12fl oz double cream
陆 tsp instant coffee powder