If you're going to make powder, why bother keeping them frozen? They take up a lot less space in the powder form. > I dry chilies fresh or from the deep freeze in the oven all the time > with no problem at all. > > I cut them in half and spread them on a sheet of expanded metal > (mesh) I set the oven at around 80/90'C (200'f) > > Leave the door ajar and usually let them dry overnight. > I then grind into powder no problem except don't snort too much dust:-)