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

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

24th October 2015
Why does Marmite go white when it’s stirred repeatedly? (iStock)

Asked by: Tom Mitchell, Durham

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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