Peanut sauce will keep for up to a week in a refrigerated airtight container. But remember to take the sauce out of the fridge about 30 minutes before serving to let it come to room temperature — you know how stubborn peanut butter can be.

Does peanut sauce expire?

It’s time to slap together a big, sloppy PB&J. … 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.

How can you tell if peanut sauce is bad?

It may also have a dark brown appearance, compared with its usual light tan color. Additionally, if it smells more sharp, soapy, or bitter, it likely has gone bad. Moreover, if your peanut butter tastes slightly sour instead of nutty, it may have gone bad as well.