why do potatoes turn dark when boiled ?

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  • Tigger
    Lv 7
    9 years ago
    Favorite Answer

    I don't think they are suppose to do that, mine never do. Must be something in the water...

  • 9 years ago

    Potatoes occasionally turn gray or dark after they are boiled; this color change may be caused by the conditions under which they were grown or stored. It's impossible to tell which potatoes will turn dark, but the discoloration does not affect flavor, texture, or nutritional value. Contact with aluminum or iron will also discolor potatoes, so cook them in stainless steel pots.

    More reasons why cooked potatoes turn black:

    If the potatoes were stored too cold (below 40 degrees F) then they can turn black. Could also have black bruising from being handled (dropped) when cold. If your potatoes turn black after they are boiled, you may be using an aluminum or reactive pot, so it's important to use a pot that's non-reactive.

    While cooling, iron in the potato combines with other natural compounds, causing a grey, black, or bluish purple color. To prevent this, after the potatoes are cooked and drained, stir in a small amount of lemon juice and keep them covered with a tight-fitting lid.

    Source(s): internet
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