buttercream frosting for biscuit decorating?

[classyinpink]

I made buttercream frosting to decorate a birthday cake. I wondered if I can decorate biscuits with it as well. I made some but they don't seem to be drying out, would they dry out eventually or should I make a different icing for biscuits?? quick replies needed!!

Buttercream icing will crust but not dry and will probably turn your biscuits soggy. Fine if eating straight away but not suitable if they are t be stored for more than a couple of hours.