The U.S. Food and Drug Administration (FDA) has elevated the risk classification for a nationwide butter recall, now labeling it a Class II recall — the second-highest warning level —due to a potential undeclared allergen.

More than 32 tons of butter have been recalled across the U.S. and in the Dominican Republic due to an undeclared allergen. Bunge North America issued a voluntary recall for 1,800 cases of butter on July 14 according to the FDA and that recall was given a Class 2 risk level where any use of or exposure to the product can “cause adverse health consequences.

Tens of thousands of pounds of butter have been recalled because milk was not declared on the butter’s label. The Food and Drug Administration said Bunge North America recalled the butter, which was distributed from 12 centers across the U.S. and one additional center based in the Dominican Republic.