How long does peanut butter last once opened?

Asked By: Coronacion Farrington | Last Updated: 1st May, 2020
Category: food and drink food allergies
4.1/5 (68 Views . 13 Votes)
An open jar of peanut butter stays fresh up to three months in the pantry. After that, it's recommended to store the peanut butter in the fridge (where it can maintain its quality for another 3-4 months). If you don't refrigerate, oil separation can occur.

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Hereof, how can you tell if peanut butter has gone bad?

Sight is usually the most reliable way to tell if your peanut butter has gone bad. A common trait of bad peanut butter is a change in texture from soft and creamy to hard and dry. The color of the spread may also become darker and the pleasant aroma disappears. If the peanut butter begins to smell rancid, toss it.

Secondly, can peanut butter go bad in heat? The oils present in natural peanut butter can go rancid, and the rate at which that happens is accelerated by heat and humidity. Please note: It's important to notice the aroma of the peanut butter before use ? if it's off, toss it. And if it should develop any mold, toss it.

Also, does opened peanut butter go bad?

Past this date, if it's unopened it's still perfectly good. Opened, peanut butter will slowly develop off-flavors of rancid nuts over the next five or so years before it'll taste so bad not even the most peanut butter-obsessed child will go near it. But it's still very unlikely to make you sick.

What happens if you eat bad peanut butter?

Low moisture levels and high oil content keep this butter from going bad for quite some time, but don't go ignoring that expiration date just yet. Peanut butter can go rancid in about a year and lose its flavor. While fungi and bacteria won't ruin your peanut butter, oxygenation eventually will.

28 Related Question Answers Found

Can botulism grow in peanut butter?

It was accepted by the parties that the peanut butter was not actually contaminated with botulism, but rather contained inactive botulism spores. Such spores exist commonly throughout nature, and often appear in food. Under ordinary circumstances, the spores are digested without incident.

What does rancid smell like?

Rancid foods have the same look and texture as when they were purchased, but their smell and taste have changed. The odour is akin to wet cardboard, oil paint, wood varnish or play dough. Some people are offended by it and know to throw the product out, while others think that's just how the product normally smells.

What is the liquid in peanut butter?

Peanut oil is also a liquid at room temperature. So as the peanut butter sits, the oil rises and collects at the top. But what if your peanut butter has no oily pool? That's often a sign it has added oils like cottonseed, rapeseed, soybean, or palm oil.

Should peanut butter be refrigerated after opening?

Answer: No — it's not necessary to refrigerate an opened jar of commercially manufactured peanut butter, says the National Peanut Board. An opened jar of processed peanut butter will usually keep well for about 3 months when stored in a dark cupboard at normal room temperature.

Does peanut butter go bad in fridge?


Peanut butter's shelf life may depend on the way you store it. An open jar of peanut butter stays fresh up to three months in the pantry. After that, it's recommended to store the peanut butter in the fridge (where it can maintain its quality for another 3-4 months). If you don't refrigerate, oil separation can occur.

Is it OK to eat peanut butter after the best by date?

Unopened peanut butter can last for months or even years after the “best by” date, depending on how much preservatives it contains. Opened peanut butter, if stored in the fridge, can stay fine to use for at least a few months past the date on the package.

Why does peanut butter not spoil?

Low moisture levels and high oil content keep this butter from going bad for quite some time, but don't go ignoring that expiration date just yet. Peanut butter can go rancid in about a year and lose its flavor. While fungi and bacteria won't ruin your peanut butter, oxygenation eventually will.

Does peanutbutter cause gas?

For instance, peanut butter can be hard to digest and can cause the abdominals to feel tight and distended, which may be linked to a food intolerance or an unknown peanut allergy. Experiment with other nut spreads such as cashew or almond butter as an alternative to reduce bloat.

Is it okay to eat peanut butter everyday?

Yes peanut butter is a good source of nutrition but it's not all good. Small amounts of peanut butter occasionally is unlikely to cause any harm, but it shouldn't be an everyday food. Keep reading for alternatives to peanut butter – as always the best diet advice is to eat a varied diet.

How do you get peanut butter out of a jar?


I have found that using hot, hot water from the faucet helps to soften the peanut butter and loosen it from the jar's edges and surface. Often times I will fill it with hot water and let it soak for 10-15 minutes or so, and then return to the jar and empty it.

Do you have to refrigerate butter?

In agreement with USDA and FDA guidelines, most butter companies say to keep butter refrigerated. Keeping butter in an airtight container like a crock makes butter last at room temperature longer (about 2 weeks), but when room temperature rises above 70° F, all butter should be refrigerated.

Why does peanut butter not need to be refrigerated?

Peanut butter has low water and sugar content, and not many bacteria exist that can metabolize the oils enough to stay in the log phase of growth long enough. Perhaps in time a species will evolve so that all peanut butter will need to be refrigerated.

CAN expired butter make you sick?

Food safety: Leaving butter unrefrigerated
Long before it reaches the point of growing mold, butter will go rancid and develop an off-putting taste and smell. Even at this stage it won't make you sick (though in extreme cases the smell might).

Does Jif peanut butter need to be refrigerated?

Jif peanut butter does not require refrigeration.

Can old walnuts make you sick?


If you eat rancid nuts, chances are you won't suffer any side effects, other than the unpleasant taste in your mouth. But in some cases, rancid nuts can cause irritation to the lining of your stomach and intestines, and you may experience nausea, vomiting or diarrhea.

Do peanut butter and jelly sandwiches need to be refrigerated?

The whole point of PB&J is that it does not need to be refrigerated. I do store my peanut butter in the fridge but that's because it's "natural" and refrigeration helps keep it from separating. I also store my jams in the fridge because eventually they will mold and they last longer in the fridge.

Can peanut butter be left in hot car?

Should be fine, especially if it is still sealed. Your only issue is that the heat may cause the oil and the solids to separate. There's no risk at all. There's no meat or whatnot in peanut butter.