Magic Mushroom Information. This is the term given to mushrooms that contain psilocybin, a hallucinogenic substance. A person can eat these mushrooms, brew a tea with them, mix them with other foods or, as some people do to mask their bitter taste, coat them with chocolate and then eat them.Approximately 30 minutes after being taken, their hallucinogenic effects can start. person can eat these mushrooms, brew a tea with them, mix them with other foods or, as some people do to mask their bitter taste, coat them with chocolate and then eat them. Approximately 30 minutes after being taken, their hallucinogenic effects can start.