what kind of icing do you use to ice the cookies that comes out looking so smooth?
Hmm are you talking smooth like you sometimes see weding cakes smooth. If that is the case that may be the fondant. Other kinds of icings such as toba's ( recipe on this site) or royal icing and it is thinned so much that it is easy to spread on the cookie and dries smooth.
Check this article out
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I am with fondantgrl. Love fondant for cookies, you are a gal after my own heart
I love RBC (rolled buttercream). It's similar to fondant (but softer so I roll it, cut and stick it in the fridge until needed) but tastes like BC.