Kitchen Myths

Facts and fiction about food and cooking, by Peter Aitken

If you put the pit in the bowl, guacamole won’t turn brown

The surface of guacamole turns brown by reacting with oxygen in the air. The guacamole that is directly under the pit won’t turn brown because the pit prevents air from getting to it. Otherwise, the oxidation process turns the exposed surface brown, just as it does on apples and other fruits. You’ll have much better luck protecting the surface from air by┬ápressing aluminum foil or plastic wrap on it.

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4 responses to “If you put the pit in the bowl, guacamole won’t turn brown

  1. craig June 7, 2011 at 3:12 am

    citrus juice (or any acid) will do the same. As Guacamole always has lime or lemon juice in it, have your citrus halved and ready to squeeze over the avacado. No browning.

  2. kitchenmyths June 7, 2011 at 8:53 am

    Excellent point! Thanks.

  3. Scott September 26, 2011 at 6:15 pm

    Just have your lime juice in the bowl already and drop the avocado halves into it. Never has a chance to get brown. Plastic wrap is still good advice if you leave it in the fridge longer than a few hours though.

  4. Matthew December 30, 2011 at 11:35 am

    airtightness helps, but not in the long run. keep an open avocado in the fridge, even in a tight ziploc bag, and it will still oxidize. Lemon juice is great, like everyone says, but you know what seems to do the trick for me? Rub the avocado with an icecube or icewater as soon as you open it, and will stay green for a very long time, and in my case, it seems to work better than lemon juice.

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