Here is a TV coverage on how "Stokerij Texel" makes their Cranberry Vodka. Ingredients? Cranberries, potatoes ... and some iStill magic!
The show is in Dutch, not in English! Here's a link:
http://www.npo.nl/texelse-wodka/11-11-2016/WO_KN_5944569
And here's "Stokerij Texel's" website: