You poor thing, sorry you never got a response! MMF is not the issue, the cake is the issue. MMF lasts forever and seals the moisture into your cake just like any other icing.
Really the concern is, how long can a cake last and still be good. I'd say, 2-3 days...4? (presuming the filling and icing are not perishable and your room temperature is cool all of the time).
Unless you are refrigerating or freezing it in advance? If it's not too late, can you post more specifics as to what you are trying to accomplish i.e. bake in advance? Bake AND decorate in advance? etc.???
I made a cake covered in fondant on Thursday and it was still good the next Tuesday. Just make sure once cut that part is covered well with plastic wrap.
Like ceshell said it's not the MMF it's the cake. Make sure the cake isn't over baked.
thankyou, I have a cake due on Sunday and I am thinking of baking the cakes Thursday and icing and covering in fondant on Friday and finishing on Saturday. Wanted to make sure the mmf wouldn't dry out or anything like that. I didn't know about freezing the cakes because I didn't want the moisture to ruin the mmf. Thanks for the help.
Your schedule is right. If for some reason you get a little dry area on it just rub a tiny amount of shortening on it to smooth it out and if needed a little powdered sugar to take the shine off.
Let us know how it turns out.
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