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Spinach (uncooked) contains a lot of moisture and is loosely packed with leaves. Once cooked, the moisture escapes and sinks into the leaves, making them softer and wilted a bit. It will also become more compacted as the leaves wilt down to one another, reducing the total quantity.

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14y ago
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12y ago

It shrinks because the leaves are releasing their liquid, and therefore actually getting smaller. However, most of the shrinkage is due to the loss of air space as the leaves wilt and collapse in on themselves. This same thing happens when you cook other leafy greens, such as mustard and collard greens, kale, cabbage, lettuce.

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11y ago

The moisture in the spinach leaves gets boiled off from the heat of cooking, reducing the size of the spinach leaf.

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14y ago

You're probably using a cast iron or carbon-steel pan. The Oxalic acid in the spinach will react to these turning the spinach black...

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11y ago

This is because the water in it forms water vapour and rises into air due to heat

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12y ago

because before cooking it has appropriate amount of water but when it was cooked it reduce some amount of water by evaporation as it was heated

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16y ago

Yes, it sure does.

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12y ago

because they shrink due to heat

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Q: Why do some vegetables like spinach etc get reduced in amount after cooking?
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