Federal regulators have upgraded a product recall of Lay's Classic Potato Chips to the highest risk level for a batch that may contain undeclared milk ingredients. Last month, Frito-Lay issued a recall warning that more than 6,

The FDA issued a product recall on Lay's Classic Potato Chips in two states. The recall was upgraded to the highest risk factor over undeclared milk.

A December recall on Lay’s Potato Chips sold in two states has been escalated to the FDA’s highest risk level, but no allergic reactions have been reported.