• blackbelt352@lemmy.world
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    2 days ago

    If I pickle them in vinegar, they turn bright pink, if I alkalize them in baking soda, they turn blue, if I cook them slowly in butter they turn a deep brown color.

    • worhui@lemmy.world
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      2 days ago

      Red onion skin is part of kids science experiments about PH. I just did that experiment with my kids not long ago.