Costco recalled 80,000 pounds of butter whose packaging omitted the allergen warning 'Contains Milk.' It follows a far worse packaging error from Mattel last week.

Costco recalled nearly 80,000 pounds of store-brand butter last month because the product's label was missing a key ingredient: milk.

Costco was forced to recall nearly 80,000 pounds of Kirkland Signature butter because of an "undeclared allergen." It forgot to list "milk" on the label.