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

Save the addition of salt, spices and other add-ins for taste, butter is a single-ingredient food. So, it may come as a surprise that on October 11, the FDA recalled 80,000 pounds of Costco brand butter for containing its only ingredient: milk.

Costco voluntarily recalled 79,200 pounds of two types of its store-brand butter over the past month because their labels may not have said the products contain milk.