Professor Marija Gimbutas , a renowned Lithuanian historian , reported to R. Gordon Wasson on the use of this mushroom in Lithuania . In remote areas of Lithuania Amanita muscaria have been consumed at wedding feasts , in which mushrooms was mixed with vodka . The professor also reported that the Lithuanians used to export A. muscaria to the Lapps in the Far North for use in shamanic rituals . The Lithuanian festivities are the only report that Wasson received of ingestion of fly agaric for religious use in Eastern Europe .