The Church of England has accused Cadbury and the National Trust of “airbrushing faith” by omitting references to Easter from egg hunts.
The Archbishop of York said calling the event the Cadbury Egg Hunt was like “spitting on the grave” of the firm’s Christian founder, John Cadbury.
The chocolate maker denied the claims saying it clearly used the word Easter on its packaging and in its marketing.
The National Trust also denied it was downplaying the significance of Easter.
The annual egg hunts at National Trust properties around the country over the Easter weekend have been run in partnership with Cadbury for 10 years.
But Archbishop of York John Sentamu said John Cadbury, a Quaker who founded the firm in 1824, was renowned for his religious beliefs and would not condone dropping the word Easter.
He said if people were to visit Cadbury World in Birmingham “they will discover how Cadbury’s Christian faith influenced his industrial output”.
“To drop Easter from Cadbury’s Easter Egg Hunt in my book is tantamount to spitting on the grave of Cadbury,” Mr Sentamu added.