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.

Last month, the U.S. Food and Drug Administration (FDA) recalled almost 80,000 pounds of Costco's popular store-brand butter due to a crucial labeling error. While the butter listed "cream" as an ingredient, the packaging lacked a critical allergen warning alerting consumers that butter contains milk.