There’s not much to this process. Just smear some fresh sourdough starter in a thin layer over a piece of parchment paper and let dry. Once dry, the starter will easily separate from the paper and can be ground up into small pieces and placed in a plastic ziplock bag.
Store your starter in the freezer for as long as you like. This is not a bad idea, as a routine measure, in order to backup your working batch of starter in case it meets with an unexpected demise.
Note: At the end of the video, I mention that you will find the video for reviving a dried starter below this one. I have since moved it here.
