Originally Posted By: Sue22
Originally Posted By: EricaK
Did you know that purple potatoes make lavender mashed potatoes, but purple string beans turn green when you cook them? It's a curious fact that I would love an answer for if anyone has one.


one simple possibility could be that some colors change color depending on pH, that's how pH indicators work, a dye that's one color at one pH and another at another. like for example red cabbage is red if you add a little vinegar, keep it acidic, otherwise it turns blue.


Oooooo... what could I add to keep it more purple?
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