I made Alices cookie icing several weeks ago and it never dried fully. I too had to add more water than it called for because I wanted it to "flow" onto the cookies. I never did get it thin enough. It hardened after about 2 days but it was still soft underneath the hardened layer. Does not harden like royal icing.
Jackie,
Search the posts, I am sure that about 1-2 weeks ago there was a thread about people drying their cookies in a low oven for about 2 hours. They were saying how shiny and pretty it made the icing turn out. I think they set the oven around 180, but am not sure.
Good luck!
I put mine in the oven with it off and just the light on.. worked pretty well
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