What can I do to make cream cheese frosting harden?

Question

After the frosting has been applied to cupcakes

beyondcelery · Answer

To add onto Mrslarkin's advice: put them in the freezer if it's an extreme case. Frozen cupcakes are fun too!

boulangere · Answer

You can also whip a little cornstarch into it.

mrslarkin · Answer

stick it in the fridge for a little while. That should do the trick!