Is there something I can add to make fondant dry hard? TIA
Add Gum-Tex to your fondant.
Like, say youre making a mermaid, just add 1/8 of a teaspoon of Gum-Tex to your fondant and it will dry firm. (But, it will still break if youre not careful)
Tylose can also be added. It helps take the moisture out faster than without it. It will also dry very hard and break if dropped or if it's put under stress.
I use corn starch.
I do a 50/50 mix of gumpaste and fondant (more or less).