I have a client traveling with a cupcake order on a Thursday for a wedding on Saturday meaning I will have to bake/decorate on Wednesday. How can I ensure that they will still be fresh for the wedding? Is there a particular frosting that works better than others for this extended period of time, and should I tell them to transport them cold, frozen, etc? Thanks for all your help!
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Depending on the type of decorations that you use, I would wrap them well and freeze them as long as possible before the wedding. The frosting will probably stay fresh for the four days, unless you are using a meringue buttercream, but the cake will not. Cupcakes really only stay fresh 24 to 48 hours normally.
Most cake will stay fresh for a few days if stored properly. The problem here is really the exposed edges of the cupcake going stale.
Consider covering the cupcakes with ganache, before frosting, to seal then up tight. Then frost and decorate as usual. You can use white or chocolate ganache to match and you won't have any problems with the cake going stale.
As for the frosting, you are in the window for the meringue buttercreams. However, if you want to play it safe, switch to an American buttercream and you should have no problems with the high sugar ratio.
What recipe do you use for the meringue buttercreams? You can leave the meringue buttercreams 3 days at room temp.