Question: are you supposed to keep peanut butter in the fridge?
Answer: 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.