I know you can make this last weeks if not months but what is better leave out or put in frig?
i left mine out from the 3rd week in June and I just finished using it. It was still good. Some people really suggest putting it in the fridge. I just left mine wrapped in a couple of layers of plastic, put a ziploc bag (sucked all the air out) and then stored in an air tight container.
ps- i love your screen name!
I do not refrigerate my MMF. I usually make up several batches and then use them over the next couple of weeks. It lasts and tastes fine. There is nothing in the fondant to spoil....just marshmallows which is corn syrup and gelatin and sugar.
I don't think it would hurt it to refrigerate it, but it will make it harder to work with. Hope this helps.