Why does Marmite go white when it’s stirred repeatedly? © iStock

Why does Marmite go white when it’s stirred repeatedly?

Marmite's all white if you whip it up right.

Asked by: Tom Mitchell, Durham

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Marmite looks dark because any light entering it is likely to be absorbed by molecules of the stuff, and thus prevented from escaping again. Stirring it introduces air-filled cavities that increase the chances of the light avoiding absorption and managing to escape. Whipped Marmite can generate so many bubbles that it turns white.


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