I want to pipe melted chocolate, let it harden, and then put it on my cake. What to I add to the chocolate? Shortening? How much? I would appreciate any tips on doing this successfully.
Thanx! 
If you keep your chocolate warm, you shouldn't need to add anything to it. In fact, I would recommend not adding anything. It can keep it from hardening properly. I would suggest keeping your chocolate warm in a double boiler (or something of the like) and only putting a small amount in your bag at a time. That way your choc. doesn't get hard before you've piped it.
You can also try putting it in 2 squeeze bottles. Keep one in a electric skillet on the lowest setting with a towel/cake board between the bottle and the skillet. This will keep the chocolate from hardening. When the bottle you are using starts to harden, switch it out with the bottle in the skillet!
Thanks ladies for your help! you're the best!
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