The brands -- Pillsbury, Old El Paso, Green Giant and Progresso -- were previously handled by D'Arcy Masius Benton & Bowles.
Last month, shortly after Publicis completed its acquisition of former D'Arcy parent Bcom3 Group, the agency holding company announced that the D'Arcy network would be shuttered.
Longtime roster shop
Saatchi & Saatchi has long been a roster shop for General Mills, handling such brands as Cheerios and its fruit snacks.
The move marks a consolidation of General Mills' $600 million-plus U.S. ad budget within two agency networks, Saatchi & Saatchi and Interpublic Group of Cos.' Campbell Mithun, Minneapolis.
The announcement follows the recent consolidation of General Mills' media operations into ZenithGPE, a newly formed dedicated unit for the food marketer.