I was hoping to get some advice on the following;
Ive been asked to make a wedding cake for a friend and she has requested a chocolate chip mousse cake (sponge and mousse).
My question is... do i need to stabilise the mousse? Im concerend that as ill be filling and decorating the cake the day before the wedding, the mousse may soften or start to break down by the next day.
I thought of chilling the cake until it is to be delivered but wasnt sure if that would effect the ganache covering or the dry out the sponge.
If i do need to stabilise it, what would i use?
Any advice would be greatly appreciated as i would hate to ruin her cake.
Thanks 
Katie
I've made a mousse type filling for a few cakes before by whipping up heavy cream with a little sugar and vanilla and then adding melted (and cooled) semi-sweet and/or milk chocolate. I add in Dream Whip I think it's called, it's a whip cream stabilizer to the heavy cream before I whip it. As long as you keep it chilled it will be fine for 24 hours and I've never had any problems putting ganache in the fridge either.
To help stabalize mousse, I place it in the freezer for approximately 10 or 15 minutes prior to placing it in the fridge overnight. You definitely must keep it chilled as KoryAK said, or it could potentially be a complete mess. I usually ice the cake with mousse the morning of delivery. That way it decreases the chance of it breaking down.
I use a whipped cream stabilizer (powder) that I found at a cake decorating store locally, add it to the cream before I whip it, and it seems to help, but my mousses are pretty stable even without it, and I've never had a problem with them. Wish I knew what the powder was called, but I long since put it in a different container.
I fill mousse cakes the day before, keep them in the fridge until the very second I deliver, and keep the car as cold as I can stand it.
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