After making a batch of mmf someone said to refrigerate for it to get darker n color, but others have said never refrigerate MMF , so which is it? Can I let mmf sit out as long as it is covered tightly in plastic? I am cornfused here.

Yes, it can be kept out of the frig, well wrapped for several days.

only for several days? I thought fondant was good for a couple months?

I had some leftover red MMF in the freezer since last February. I got it out last night, let it thaw, and kneaded it until it was soft and pliable. It tastes fine. I didn't try to cover a cake with it yet, but I think it will work just fine.

sooo, once it's on a cake...can it be refrigerated? Covered or uncovered? I'm not trying to hijack the thread, but, I need a cake for sunday evening, and I'm leaving town early Saturday morning, so if I make it friday night (it has a filling that requires refrigeration), would it be okay? Thanks so much in advance.

I'm not the expert here, but I can share my own experiences. I have refrigerated both MMF and regular fondant after it was on the cakes. I know that condensation is the enemy. I covered the cakes I refrigerated, and both of them came out fine. Just make sure your refrigerator isn't on the coldest setting, and have your AC going when you take them out. I would let your cake sit out a while, maybe about 30 minutes, before transfering to a warmer car. HTH