I used to work at a bakery years ago where they had a simple icing recipe for their wedding cakes.  I wrote it down back then, and thought I held on to the recipe, but I can't find it anywhere.  I was hoping someone had one similar they could share.  Unfortunately all I remember is that it had shortening (I don't think they used butter with it) and very hot water.  I can't remember if they used powdered sugar or granulated sugar.

 I just remember it being very light and airy.  It looked like it was whipped cream, but when you tasted it, you could definitely tell it was more of a shortening based icing.  They were able to ice it and make it look like fondant, very smooth with no spatula marks.  It didn't crust at all.

  I love the taste of my current buttercream recipe, and for the most part I can get mine to look very smooth, but was really looking to try theirs and am so frustrated I can't find it!    Any thoughts would be helpful!  Thank you!

Maybe this is it. 

http://thecakegirls.com/recipes/buttercream

Awesome!  I'll try it!  Thank you very much!