A couple of months ago & i opened a box of Wilton fondant for a cake I was making I didn't use the whole thing, I doubled bagged it & up till now its still in my cupboard..
my question is it still ok/edible??
if so can I turn it into gum paste by adding Tylose powder??
How does the process go & what are the proportions??
TIA
Just add Tylose. The amount will vary based on the humidity in your area. Start sprinkling and kneading and when it no longer feels sticky and is somewhat elastic you're good to go! It's best to add the Tylose the day before you intend to use the gum paste...just "re-activate" with a bit of shortening as you use each piece.
I think it depends on what you are going to use it for. I've done the Tylose thing and honestly I don't like it. Yes, it hardens it, but it's just not the same as pre-made gum paste. I worked at a bakery where they added Tylose to fondant to make flowers and such, but it wasn't until I left and starting decorating on my own that I discovered gum paste and how wonderfully thin I could get it without it cracking or breaking. My favorite is the Wilton pre-made stuff and I get it at Michaels with the 40% off coupon. If you're looking to make items that need to be thin, and dry fast and really hard then stick with real gum paste if you can. IMO! 
Tylose and fondant is good in a pinch when you need to make something and have it dry hard and don't have any gumpaste. It's about 2tsp per pound of fondan but I've added more when I've wanted it to dry faster. The head and footboards on my Toy Story cake were made from fondant and tylose and dried pretty quick.
But, as a PP said, I prefer gumpaste whenever I can. I used to use the Wilton gumpaste but I don't really like it and their packaging is stupid. I love the Satin Ice gumpaste.
I found that mixing Tylose/CMC with fondant was not a very good substitute for making flowers etc. as it drys too brittle and breaks, the readymade stuff that you can buy is much better, but it can be used as modelling paste for making small figures etc. HTH 
As the other posters have said, adding tylose, CMC or the like to fondant doesn't make it into gumpaste, it makes it into modeling paste, great for figures and a bunch of other things ( like swags, bows....). Another way to make modeling paste ( also called 50/50), is mixing half fondant and half gumpaste, that's the old school way before we had the tylose/CMC options. Gumpaste is a different product and can be rolled so much thinner for flowers. So it really depends on what you want to do use it for.
As the other posters have said, adding tylose, CMC or the like to fondant doesn't make it into gumpaste, it makes it into modeling paste, great for figures and a bunch of other things ( like swags, bows....). Another way to make modeling paste ( also called 50/50), is mixing half fondant and half gumpaste, that's the old school way before we had the tylose/CMC options. Gumpaste is a different product and can be rolled so much thinner for flowers. So it really depends on what you want to do use it for.
I have a question if I may? Can MMF be used as a 50/50 will it work the same way?
Thank you for all the replies you guys ROCK!! I always find my nswers here thanks again 
just one tiny question, is my 2-month old fondant still good or should I throw is away?
TIA
Thank you for all the replies you guys ROCK!! I always find my nswers here thanks again
just one tiny question, is my 2-month old fondant still good or should I throw is away?
TIA
Guess we got on the Tylose thing and missed your original question! Yes use it! As long as it isn't dried up it's good to go. I save all my leftover colored fondant to use in other things.
lol no worries
see that's it...you get different answers regarding one thing.. I've heard a couple of times that fondant doesn't last more than 2 weeks even the box itself says "save up to 2 weeks" & then comes CC & its a different world, I love you guys
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