Italian confectionery group Ferrero has agreed to set aside $3 million to settle a class-action lawsuit championed by a Californian mother after she discovered the group's Nutella chocolate spread packed more calories than jam or syrup.

Notices of class action settlements said that Ferrero USA Inc., the group's U.S. division, would pay up to $4 for every jar of Nutella bought in California since August 2009, or bought anywhere else in the United States since January 2008.

The notices posted on nutellaclassactionsettlement.com said the settlement was for $3,050,000 in total.

Ferrero USA also agreed to "modify certain marketing statements about Nutella" and to give more prominence to nutrition labels on Nutella jars, the notices said.

"Ferrero USA continues to stand by its product," a spokeswoman for Ferrero said on Sunday. "We believe that it is in the best interest of the company to resolve these matters, and have reached an agreement with the parties involved."