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the process is called gelatinization- which occurs when heated starch molecules absorb water and expand. sometimes they expand 2-3 times their volume when cooked.

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12y ago
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13y ago

Cereal grains expand mainly because of water absorption. Starch granules in the cereal grains will gelatinate and absorb water when heated.

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Q: Why do cereal grains expand upon cooking?
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