Some foods have short shelf lives and can go bad within days, but oatmeal isn't one of them. This pantry staple can last for years beyond its expiration date without losing flavor.
However, its exact shelf life depends on the type of oats, how they're cooked, and where they're stored. There are also ways to keep oatmeal fresh for longer and reap its benefits.
Dry oats can last for years if stored properly. It's best to store them for up to one year, especially if you've opened the box, but these guidelines aren't universal.
Depending on the manufacturer, quick-cooking rolled oats can last up to 30 years. Steel-cut oats and instant oatmeal can last one to two years unless they have perishable add-ins.
Generally, it's safe to eat expired oats as long as they have no signs of mold or insect infestation. Dried foods can be contaminated by pests, even if the packaging stays intact.
Oats are rich in free fatty acids, which can cause them to become rancid over time and develop a bitter flavor. They may also lose their crunchiness, especially if exposed to air.