The Food and Drug Administration is using its most severe notice in a recall of more than 6,000 bags of chips in two states because of “undeclared milk.”

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.

Frito Lay issued the recall in December after it was found that there was a potential or undeclared allergen, specifically milk, in the chips.

The Food and Drug Administration has upgraded a December recall of Classic Lays Potato Chips to Class 1, the highest priority designated by the agency.

The U.S. Food & Drug Administration has recalled a popular brand of potato chips saying the product may be high risk for some consumers.

The Food and Drug Administration has newly classified the December recall of some Lay’s Classic Potato Chips sold in Oregon and Washington with the designation reserved for the highest degree of health hazard.

The FDA has upgraded a recall of Lay’s Potato Chips to the highest level possible, meaning consuming the chips will cause adverse health consequences. In December, Texas-based food manufacturer Frito Lay recalled a limited number of Lay’s Classic 13oz because the product could contain undeclared milk ingredients.

Class I, according to the FDA, means exposure to or consumption of the product could cause "serious adverse health consequences or death."

After Frito-Lay issued a recall for some of its Lay's Classic Potato Chips last month, the the U.S. Food and Drug Administration has determined the select bags of snacks pose a serious health hazard.

Lay recall on Lay's Classic Potato Chips across Oregon and Washington was updated to a Class 1 recall by the FDA on Thursday.

Get ready for an onslaught of ads full of celebrities, cute animals and snack brands during breaks in the action at Super Bowl 59 on Feb. 9, when the Philadelphia Eagles face the Kansas City