I want to make the Buttercream Dream icing recipe but want to know if I have to let the 2 sticks of butter sit out awhile before I mix up the ingrediants? if so, how long....Or just throw the butter in cold right from the fridge. Help! I want to make it tomorrow and really want to do it right!

I will be using this to ice the cake and to decorate. How is this for decorating.....

Thanks!!

Kelly