Also my first post, but I've lurked for a while. 
I have made gumpaste by adding Tylose powder to prepared fondant. The proportion I used was 1 T. tylose to 1 lb. of fondant. But if it's very humid, you may need a little more.
The easiest way I've found to do this is to sprinkle the work surface with the Tylose and knead the fondant over it until the powder is mixed in well. Hope this helps!
Toba Garrett gave us a formula for "quick gumpaste" made using 1 pound of commercially prepared fondant and 1 teaspoon of Tylose kneaded together with 1/2 teaspoon of shortening. Nicholas Lodge said that this did work, but the resulting gumpaste is not quite as strong as regular gumpaste. Adding more tylose will help it to dry faster, but you will need to work quickly 
I've added the powdered fixodent to fondant and it works really well!! Add about 1 tsp of powdered fixodent to a wad of fondant/MMF about the size of a baseball. It has to be the powdered fixodent. Here are a few cakes where I've used "fixed MMF"
The spout and handle
http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=309683
Tink's wings
http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=24342
The body and extremities
http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=25490
Yes, that's the fixodent I've used - powdered fixodent for dentures. It goes in your mouth, so it's definitely not toxic. But if you're trying to get a piece to harden, just like gumpaste, then that decoration usually is not meant to be eaten.
I'm a fan of using commercial fondant w/ tylose powder kneaded in. I live in a high humidity area and this dries faster/harder than regular gumpaste!
Also my first post, but I've lurked for a while.
I have made gumpaste by adding Tylose powder to prepared fondant. The proportion I used was 1 T. tylose to 1 lb. of fondant. But if it's very humid, you may need a little more.
The easiest way I've found to do this is to sprinkle the work surface with the Tylose and knead the fondant over it until the powder is mixed in well. Hope this helps!
That's what I do too 
Hi all,
I would like to try making gumpaste flowers for my daughter for her Mothers day cake and would like to try this recipe too.
Do you need to "rest" this before using or can you start rolling and forming as soon as the Tylose is mixed in?
Thanks in advance!
Cheers
Terry
When you add tylose to fondant it does NOT make gum paste. It makes the fondant stiffer and it will dry faster, but true gum paste can be rolled paper thin without tearing and dries so much faster than the fondant/tylose mix. I used to work for a bakery that did this and all their bows and figures and flowers were thicker and heavier than those made with real gum paste.
It wasn't until I left and made my first bow that I used Wilton's pre-made gumpaste and I have never looked back.
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