I made some choc MMF and used it to shape some teddy bears, but the fondant is very heavy like and it is starting to "squash" down...what can I do to make it not slump down so much??

I have no idea how tylose performs in MMF but I just add tylose on my fondant.

I prefer Michele Foster's Fondant or commercial brands for figures, I've found MMF to be too soft. If you only have MMFm try adding some tylose to it to firm it up, or mix it 50/50 with commercial brand.

Do you have any tylose powder? I use it in mmf to help it keep it's shape. It will help speed up the drying process too.

Just be careful not to add too much, it will be harder to shape because it bounces back too much.

Tylose works well with MMF I've used it, works well.

Thanks ya'll! I think I'll try the Tylose....