7. Cornstarch
Cornstarch is a thickening agent you might not use daily, but it is one of the most used foods with long shelf life and it lasts forever if stored correctly. It’s naturally dry and doesn’t spoil unless it’s exposed to moisture or pests. Keep it in an airtight container and store it in a cool, dry cupboard. It’ll be good to use for years. It’s great for gravies, sauces, and even some baking recipes. Cornstarch can also be used in DIY dry shampoos or skin soothers. So, even if you’re not cooking with it often, it’s still a smart staple to have on standby.