The peanut butter that's got sugar and emulsifiers and preservatives in it and doesn't separate doesn't usually need to be kept in the fridge. The peanut butter that's just ground peanuts does. Tahini is much more like the latter.
("Need" is variable with how fast you use up your peanut butter or tahini.)
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Date: 2017-12-06 10:36 pm (UTC)("Need" is variable with how fast you use up your peanut butter or tahini.)