The reason for chocolate addicts or “chocaholics” can be contributed to the bioactive compounds found in chocolate; theobromine and caffeine, which are stimulants; tyramine and phenylethylamine, which are similar to amphetamine, a central nervous system stimulant; and anandamide, which can act as a cannabinoid mimic. However, all of these compounds are present only in trace amounts in chocolate and are found in many other commonly consumed foods that are not craved. 

Researchers have found that cocoa-filled capsules, which contained all of the same compounds as chocolate, did not satisfy cravings the way actual chocolate did. They and others have concluded that the pleasant sensory experience of eating chocolate, including smooth, melt-in-your-mouth textures and sweet tastes, is necessary to satisfy the intense craving...