i avoid caffiene completely which means no chocolate! i'm in a program at my local hospital which recs a product called wondercocoa - it has been a God-send! it is all natural so i isn't a bunch of gross chemicals you can't pronounce and it is 99.7% caffeine free
here is the site from the hospital with recipes and info - the chocolate torte is a favorite among our program's participants!!!
https://www.hsc.wvu.edu/wellness/ornish/WONDERCOCOA.2.pdf