How long after expired day do cookies last?

Cookies can last for about one to two weeks after their expiration date if stored properly in an airtight container. However, their quality may decline, and they might become stale or lose flavor. It's essential to check for any signs of spoilage, such as an off smell or mold, before consuming. If the cookies contain perishable ingredients like cream or fruit, it's best to discard them once expired.