The chocolate festival is a must for chocolate lovers. The fair is held in Tübingen (45 km for Stuttgart), so you can also take the opportunity to visit this city. Starting on November 30th and ending in December 5th, it offers a wide range of worldwide chocolate specialists selling and promoting their fine products.
From a chocolate market in the historic center to chocolate massages, there is plenty of options for everyone.
For more information : http://www.chocolart.de/en/about/festival/