I made 48 cupcakes for a Father's Day event at my son's school. I used the basic Wilton Buttercream recipe for the frosting to make grass, and then made "lawnmowers" on them. However, after being in the fridge for only one night, the frosting is HARD as a rock! What can I do? Any suggestions would help!

let them come to room temp. the fat in the icing will loosen up a little once they are not cold.

The icing is cold and difficult to work with unless it is at room temp. No worries, just leave it out for a little while. Good luck!