Is there a better snack than a spoonful of creamy, nutty peanut butter or a more decadent dessert than Peanut Butter Brownies? If you’re nodding your head, then you know nothing is worse than pulling out a jar of peanut butter only to be met with an empty container or, worse, an unexpected taste.
Does Peanut Butter Go Bad?
Yes, peanut butter does technically go bad, but the chances of consuming rancid peanut butter are low because it’s a relatively shelf-stable pantry item.
Peanut butter’s high-fat, low-moisture content means it does not “go bad” in the traditional sense, notes Jerry Lanuzza, MS Ed., CHE, Associate Professor at Johnson & Wales University. “The fat may become rancid after prolonged storage, resulting in a metallic aroma, an unpleasant taste, and an unusual appearance,” he explains.
As far as making you sick, Lanuzza says the risk is extremely low. “Rancid peanut butter generally would not cause illness if consumed, but the experience would be unenjoyable,” he adds.
How Long Does Peanut Butter Last After It’s Opened?
About 3 to 6 months in your cupboard if it is covered tightly, kept away from heat, and out of sunlight, says Lanuzza.
It will last up to 9 months when stored in the refrigerator in a tightly sealed container.
“Do not store it in the cupboard above your stove or microwave,” he warns.
Does Peanut Butter Need To Be Refrigerated?
Peanut butter doesn’t need to be refrigerated, but it can be. Its high-fat and low-water content allow it to be stored outside the fridge safely.
“If you choose to store your peanut butter in the refrigerator, be aware that it will be more difficult to spread on bread, crackers, waffles, or whatever you choose,” says Lanuzza.
What Is The Shelf-Life Of Peanut Butter?
If you’re wondering how long a jar of peanut butter will last, there’s good news! According to the USDA, “You can keep peanut butter in the pantry for six to nine months (unopened) and two to three months (opened).”
Where To Store Peanut Butter
Conventional peanut butter should be stored in a cool, dry, and dark place. According to the FoodSafety.gov’s Food Keeper App, unopened natural peanut butter can last up to a full year in the refrigerator.
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