Eli5: why does “good” peanut butter need to be refrigerated?

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The only ingredients on the label are “peanuts, salt.”

We keep peanuts unrefrigerated in the pantry… we keep salt unrefrigerated in the pantry… so how come when you mash them together it makes something that (according to the jar) must be refrigerated after opening?

P.S. I put “good” in quotes because all peanut butter is good. What I mean by “good” peanut butter is the healthier stuff that you have to mix the oil back into and there are only the above mentioned ingredients.

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17 Answers

Anonymous 0 Comments

It doesn’t. I store peanut butter (just peanuts and salt) upside down on the pantry so the oils don’t just all accumulate at the top. Works fine. The jars here don’t say to refrigerate it though haha, strange!!

My peanut butter of choice is Fix and Fogg and I’m yet to try a better brand. I also go through a large jar in less than a month so I’m not worried about it going rancid.

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