Instant Chocolate Mousse Keeping and Ingredients

Our answer

Nigella's Instant Chocolate Mousse (from Nigella Express and on the Nigella website) is made using melted mini mashmallows as the marshmallows contain gelatine and the gelatine is useful for helping the mousse to set. Unfortunately a marshmallow creme (such as the brand marshmallow fluff) doesn't contain gelatine, as it is designed to be spread, so it would not be a suitable alternative for the marshmallows.

Most marshmallows should be "fat free" as they are made from sugar, glucose syrup, gelatine and cornflour (cornstarch). As long as your marshmallows contain these ingredients they it should be possible to use them in the mousse.

The Instant Chocolate Mousse will keep for up to 4 days in the fridge, but is best within 1-2 days of making. We would recommend that you cover the tops of the glasses loosely with clingfilm (plastic wrap), trying to avoid touching the tops of the mousses. The mousse is quite soft so we are not sure that it is ideal for using as a cake filling, as the mousse will squish out of the sides slightly as the cake is cut.