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:

http://www.stokerijtexel.nl/