Mushroom chocolate, or magic mushrooms, contains psilocybin, which is modified in the body to psilocin after ingestion. Mushroom chocolate, or magic mushrooms, contains psilocybin, which is modified in the body to psilocin after ingestion. Both compounds are hallucinogens that work by promoting a loop of communication between neurons, contributing to neurotransmitter release. Additionally, psilocybin mimics a chemical called serotonin, a neurotransmitter related to feelings of happiness and well-being that contribute to the euphoric high that’s the common catalyst to psychedelic drug use. t is believed that chocolate mushroom effects work like cars on a highway. When a person ingests shrooms, just like a car can stray from the highway, it gives free rein for people to take different routes.