What should be done when combining ingredients regarding date marking?

When combining ingredients, it is essential to prioritize food safety, which is best achieved by using the oldest date among the ingredients. This approach ensures that the combined product remains safe for consumption by respecting the shortest shelf life of its components. If an ingredient has an earlier date than the others, it could spoil first, leading to potential foodborne illnesses.

By using the oldest date for date marking, you can maintain an accurate reference for when the food should be utilized or discarded. This practice aligns with food safety protocols, helping to ensure that all food items are stored and consumed before they reach their expiration or best-by dates. Therefore, marking the combined ingredient with the oldest date is crucial for ensuring compliance with food safety regulations and protecting public health.