Is there an accredited doctorate in gastronomy? Can someone do research and eventually obtain a PhD in a gastronomy-related field (not approached from the side of chemistry, history or culture but rather from the culinary side) from an accredited university?
Aside from the programs/universities mentioned in the link which Zenon gave in a comment, it appears that you may need to tweak a molecular gastronomy program to fit your interests. The Italian University of Gastronomic Sciences looks to have several programs that might fit your desired focus.