Thank. Just started frosting and frosting started to melt. Realized cake was not completely cool. Will wait a half hour.

As in frost it now and eat it tomarrow. Sure. Just keep it in the fridge until an hour or two before eating. If you mean make the frosting now and frost tomarrow, no. It will get too hard in fridge and can be tricky to warm up.

First attempt at icing r son's bday tomorrow. Got worried when recipes said use immediately....