An unopened packet of ketchup is OK to use for one to two years after the expiration date printed on the packet. Expiration information is labeled as a "best by" or "use by" date.Continue Reading
Tomato ketchup is a popular condiment for foods such as hamburgers, french fries and hot dogs. Small ketchup packets are available at restaurants and fast food establishments. Generally, ketchup packets remain good for up to a year after the printed expiration date.
The vinegar and tomatoes in ketchup make it acidic, which allows it to stay fresh longer. Ketchup that is no longer safe to eat turns to a dark maroon color with a thick consistency.Learn more about Food Spoilage
Parmesan cheese does go bad, but it can outlast the printed expiration date, according to EatByDate. Parmesan cheese kept in the refrigerator is usually good two to four months past the expiration date. When kept in the freezer, it is good for six to eight months after the expiration date.Full Answer >
Shelf life for commercial canned foods can be determined by reading the expiration date located on the can's packaging. Canned goods bought at the grocery store are best when eaten within two to five years from the date of manufacture. Food quality gradually degrades after the date of expiration.Full Answer >
A box of prepackaged cake mix, which usually has a "best before" date rather than an expiration date, can usually be used for up to 5 months past the box's printed date. This is contingent on the box being unopened and kept in a cool, dry place, such as a kitchen pantry.Full Answer >
Unpopped popcorn does not typically have an expiration date. Instead, manufacturers usually stamp it with a "best by" date to indicate the date on which freshness can start to deteriorate.Full Answer >