The Daily Local News of West Chester reports the girls were also ordered Monday to pick up dog droppings at a local park during their 200 hours of community service in return for guilty pleas stemming from the March incident at Avon Grove High School.
Authorities say the trio and a juvenile student provided school officials with written confessions after a classmate and her family was sickened by the cake.
The Daily Local News report say Mayra Flores, Ana Mireles and Sandra Ortiz also received probation after pleading guilty to recklessly endangering another person and conspiracy.
The juvenile's case is still pending.
Information from: Daily Local News, http://www.dailylocal.com