Nigella's instant mouse
Put the marshmallows, butter, chocolate and water in a heavy-based saucepan.
Put the saucepan on the hob, over heat, though keep it fairly gentle, to melt the contents, stirring every now and again. Remove from the heat.
Meanwhile, whip the cream with the vanilla extract until thick, and then fold into the cooling chocolate mixture until you have a smooth, cohesive mixture.
Pour or scrape into 4 glasses or ramekins, about 175ml each in capacity, or 6 smaller (125ml) ones, and chill until you want to eat. The sooner the better!
150g mini marshmallows
50g soft butter
250g good dark chocolate (minimum 70% cocoa solids), chopped into small pieces
60ml hot water from a recently boiled kettle
1 x 284ml tub double cream
1 teaspoon vanilla extractServing Size : Serves 4–6