Edna has a youtube video of how to use them.. she makes them look super easy. She uses gumpaste only. I haven't gotten any yet, but I am going to.
I have used fondant with a little Tylose and I have used straight gum paste but most of the time I use 50/50 fondant and gum paste.
It takes a while to get the hang of it and you might have to make each letter a few times to get it right. But I like them and use them often.
I used to add tylose to the fondant, but the cake that I just recently did I just used straight fondant rolled really thin worked just perfectly. I had zero problems. It does take some working figuring out how thin to roll it. I always roll mine really thin, cut a bunch of squares of wax paper and then I cut a square of the fondant and then cut out the letter. I let the letters dry before taking the wax paper off. I am sure that some people may have some better ideas, but that works for me.
A great tip that I got from Sharon Zambito is to roll your gumpaste or fondant pretty thin and then set it aside for a while to air dry a bit before pressing your tappit into it. The fondant or gumpaste pops out of your tappit much easier and cleaner using this technique.
I just used these for the first time yesterday and they were awesome! After a few failed attempts, here's what worked:
I used gumpaste (no tylose) and spread it out thin over powdered sugar so it wouldnt stick. I let it dry a bit and then pressed in the letters. I also dusted the tappit itself with powdered sugar. In most cases they popped out like a charm, a few had to be coaxed out a bit with a pin, but came out easily.
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