The recipe for Nutella has changed, leading to threats of a boycott by some customers. Fans of the hazelnut spread noticed it's lighter in colour.
It's makers, Ferrero, are suspected of adding more powdered milk and increasing the sugar content.
The company reportedly said "The quality ... and all the other characteristics of Nutella remain the same."
However, a German consumer group believes the quantities of powdered skimmed milk increased from 7.5% to 8.7% and the sugar content rose from 55.9% to 56.3%.
Ferrero, who make the spread, has only admitted that is has made an "adjustment" to the product.