Originally Posted by
SQ325
I would skip the black-forest in Winter. Due to the global warming snow is not always guaranteed there even on higher altitude. Switzerland would be the better option. I would also recommend rather Bern or Luzern as a base than Basel.
I would actually suggest the Black Forest. Beginning of January would basically guarantee you snow around the Feldberg.
And if you're fed up with snow as it can be rather bland if you're not into skiing or anything, it's close to Freiburg, Strasburg, Basel, Stuttgart, Karlsruhe or any of the cities there worth a daytrip.
But based on past performance, I'd say you'll already get snow in AMS.