Nestlé recalled refrigerated Toll House cookie dough in 2009 during an investigation into an E. coli outbreak.
The recalled products were made at Nestlé's plant in Danville, Virginia, and included refrigerated cookie dough sold under the Toll House brand. The investigation linked illnesses to consumption of raw dough, although the company also examined ingredients and production conditions.
Nestlé recalled more than 300,000 cases of dough and advised consumers not to eat it raw. The company later said the recall was a precaution while health authorities investigated the illnesses.
People often remember this event as a warning about raw dough generally, but the product recall specifically concerned Nestlé Toll House refrigerated dough. Flour and eggs can carry pathogens, which is why later packaging emphasized baking before eating.