You can 'can' any kind of cake. I've never tried it with icing though. I only keep mine no longer than 6 months, not that they actually last that long! Canning bread or cakes is the same as canning anything, yes it can make you sick, IF IT ISN'T DONE PROPERLY!!! As long as you follow the directions and heat the required temps, then you should be okay. Making sure that your jars are clean sealed is important.
Michelle
DMK Ranch
Michelle
DMK Ranch