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Question

Do I peel the potatoes before soaking them in lemon juice or vinegar?

Answer

It depends on your goal:

For preventing browning (oxidation): Peel and then soak the potatoes in water with lemon juice or vinegar. This keeps the exposed flesh from turning brown.
For cleaning purposes: If you're just washing off dirt and bacteria, soak them whole and peel afterward.

If you’re storing cut potatoes in water with acid, don’t soak them for too long—1 to 2 hours is fine. Longer soaking can make them absorb water and affect texture when cooked.

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