I few weeks ago I tried making my own fondant but it just turned out rock hard. So this time I decided to try MMF. I mixed it like I was told and wrapped it up put it in a baggie and then in tupperware. it felt like the perfect texture and everything. Let it sit over night. But the next day it was back down to soft gooy marshmellow. What went wrong? Can I fix it? I'm about ready to just go out and buy fondant.

I have had the same problem, so I hope somebody will give you and answer. I'd love to know, too!

Sounds like you need to knead in some more powdered sugar.

Same thing happened to me. I made it yesterday and it ended up a little too soft. Today I added more powdered sugar; little by little. It turned out well.

i agree