Leonarda Cianciulli (1893-1970) was an Italian serial killer who gained notoriety for her gruesome murders of three women in the 1940s. She was known as the "Soap-Maker of Correggio" due to her practice of turning the bodies
From Wikipedia
Leonarda Cianciulli was an Italian serial killer and cannibal. Better known as the Soap-Maker of Correggio, she murdered three women in the town of Correggio, Reggio Emilia, in 1939 and 1940, and turned their bodies into soap and teacakes.