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Jan 20, 2014 09:05 PM

Costco Basil pesto

Every time I buy a jar Costco Basil pesto I never use it all. But the next time go to use some the use up by this date has long pass.
What can go bad in this stuff?

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    1. re: magiesmom

      That's what I'm asking, is it OK to use after the use up day goes by? What could possibly go wrong with the stuff kept in the refrigerator?
      In the future I will keep it in the freezer and get it out needed.

      1. re: GaryBymyself

        I freeze pesto all the time, just add a thin layer of EVOO before freezing.

        1. re: GaryBymyself

          I freeze it in ice cube trays. Once solid, I transfer the cubes to a ziploc bag. It takes us months to get through one of those jars so this works out well for us. The date on the jar is just a precaution... as long as it smells and looks good, use away.

          I did have one jar that I didn't freeze. It kept in the fridge for a long while but did eventually grow mold.

      2. Costco used to sell a jarred pesto that was real pesto ... i.e., more basil than any other ingredient.

        Now they have reformulated it to use "basil blend" instead of basil. The blend is cheap oil flavored with (much less) basil, some kind of grated cheese and lots of salt.

        The new stuff is a radically inferior product, compared to the old. But since it has little fresh basil in it, it seems to keep forever in the fridge. It lasts for weeks ... maybe many weeks ... beyond the sell-by date. if it looks OK and tastes OK, it's probably OK. Too bad it's become ersatz American industrial crap, though. The old product, while it was real pesto, usually started getting funky within a week of opening. I suspect Costco turned the product into crap because of complaints about how it went bad so fast.

        1 Reply
        1. re: emu48

          I find their pesto to be very good in a pinch, as I usually make my own. Compared to some stuff I find in super markets, it's pretty good for a prepared food.

        2. Thank you all for your help!
          Next time I buy some at Costco I'll never worry about it again being in my refrigerator too long. I'm going to freeze it in ice cube trays and store them in ziplock bags.

          1 Reply
          1. re: GaryBymyself

            I don't even bother with the ice cube trays. I spread my pesto about an inch thick on a parchment covered pan and freeze it. Once frozen, I cut it into cubes of various sizes and store in bags. Much easier to clean up and no messing with ice cube trays