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Why Cut Potatoes Turn Black and How to Store Them Correctly
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News18•11-10-2026, 11:53
Why Cut Potatoes Turn Black and How to Store Them Correctly
- •Potatoes turn black due to enzymatic browning when their internal compounds react with oxygen in the air.
- •Submerging cut potatoes in cold water prevents direct contact with air and stops them from turning black quickly.
- •Storing cut potatoes in a covered container of water inside the refrigerator helps preserve them for several hours.
- •Adding a little lemon juice or vinegar to the water increases acidity, slowing down the discoloration process.
- •Always drain and thoroughly dry potatoes with a clean towel before frying to avoid oil splattering.
- •Lightly discolored potatoes are safe to eat if they smell normal, but soft, sticky, or foul-smelling ones must be discarded.
Key Questions Answered
When a potato is cut or peeled, its internal enzymes and natural compounds react with oxygen from the air, causing a natural process known as enzymatic browning or oxidation that changes the surface color.
You can submerge cut potatoes completely in cold water inside a clean container to limit direct contact with air. For storage lasting several hours, keep the covered container of water with the potatoes inside the refrigerator.
If potatoes only turn light brown or dark due to air exposure while maintaining a normal odor, they are still safe to eat and are not spoiled. However, you should discard them if they become very soft, sticky, moldy, or smell unusual.
