The University of Wisconsin - Madison offers six different self-study food engineering courses. Four of the classes are for sugar confections and two for chocolates. The prices are reasonable and it appears anybody can enroll as they are for professional development. Just thought I would share. Here is the link:

http://epdweb.engr.wisc.edu/Courses/index.lasso?myRegion=Chemical%20and%20Biomedical&myRegionHead=R-03&#FoodEngineering