Your mousse will remain edible for up to two months in the freezer. Use this technique for all chocolate mousse recipes except those that use beaten egg whites as the leavening. Pour the mousse into an airtight container. Leave 1 inch of headroom for expansion as the mousse freezes.Click to see full answer. Also to know is, can I put mousse in the freezer?I put my mousse in the freezer because I wanted to speed things up, and I don’t mind it a little more solid. If freezing the mousse cake, be sure to take out 15-30 minutes before serving so it can have a chance to thaw. You can also put it in the refrigerator an hour before serving.Similarly, can you freeze a cake with mousse filling? Once baked, cool them completely and then wrap them in a double layer of plastic wrap. Place them in a freezer ziplock bag and freeze for up to 3 months. The mousse could also be made up to 5 days in advance, stored in the fridge (although its texture is best the day of). Similarly, do you freeze or refrigerate mousse? Wrap each container in a double layer of clingfilm and then in freezer bags. Freeze for up to 2 months. As the mousse contains gelatine and some sugar it will not freeze completely solid. Thaw the mousses overnight in the fridge and consume within 24 hours.How do you store mousse?You can refrigerate the mousse in the bowl and then use it as a filling, or go ahead and portion it out into cups before refrigerating. It will take a good 3 hours to completely firm up, but is significantly firmer after 1 hour. Mousse will keep well covered and refrigerated for up to 5 days.