How is puffed wheat puffed?

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Washing Up
Aug 8, 2010
We have puffed wheat for breakfast sometimes, when I asked wondering how manufacturers puff their wheat?

My DD says the wheat grains are first heated, then pressurised with compressed air - then the air is suddenly released, causing said grains to puff up.

Is this true?
Gosh, .40 - my DD wasn't far wrong being ever the scientist. :D

Thanks very much, and to you, MSC.
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