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.

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.

Costco customers with dairy allergies may need to check their fridge due to 80,000 pounds of the retailer's butter being recalled for packaging missing the "Contains Milk statement," according to the U.