Maybe the coco butter could be replaced with a high Ω-3 oil?
Cod liver oil?
Maybe, just for good measure, grind up & add some Carter's Little (Liver) Pills, and some Lydia ("A baby in every bottle!") Pinkham's, all adjusted for one dose/'serving'.
An alternative would be Vegemite in every bite.
Thank you, I'll just keep my chocolate as a decadent, unhealthful, no socially redeeming features treat.