Last month, a recall was issued for Lay’s Classic Potato Chips sold in Oregon and Washington due to the potential presence of an undeclared allergen: milk. The FDA has since classified the recall as a Class 1 risk, similar to a recent recall reclassification involving a Costco product.

Frito-Lay issued a recall notice for over 6,000 13-ounce bags of its Lay’s Classic Potato Chips because they contained an undeclared milk allergen. On Jan. 27, the U.S. Food and Drug Administration (FDA) upgraded the recall to Class I status,

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.”