The Food Lab: Better Home Cooking Through Science

(Nandana) #1

DRYING VERSUS STALING


Drying and staling are not the same thing. Here’s
the difference:



  • Drying involves the evaporation of moisture


from    within  a   piece   of  bread.  The structure   of  the
bread remains more or less the same, though it
become less pliable because of the moisture loss.
Dry, not stale, bread will be crisp like a cracker
and crumble into a fine powder. Bread that has
dried out is very hard to refresh.


  • Staling is the process by which moisture


migrates     out     of  swollen     starch  granules    and     into
the spaces in the bread. The moisture-deprived
starch molecules then recrystallize, forming tough
structures within the bread. Stale, not dry, bread
will taste leathery and chewy, not crackery or dry.
Bread that has staled can be refreshed by heating
it, causing the starch granules to reabsorb
moisture.

It’s quite possible for bread to stale without drying—
just think about what happens to a loaf of
preservative-free bread when you place it in the
refrigerator overnight. Staling actually occurs much
faster at cooler temperatures, which is why your

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