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Brown Poultry Stock


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#1 scott123

scott123
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Posted 10 November 2004 - 03:40 PM

I have observed unroasted 'white' poultry stock taking on more and more color as I simmer it. This coloring seems to accelerate during the final reduction phase.

This 'coloring' is the production of maillard compounds, is it not? At 212 degrees?

In fact, I have taking a white chicken stock, reduced it, added water, reduced it again, added water and then compared that against a roasted chicken stock. To my palate, the flavors formed were exceedingly similar between the concentrated simmered stock and the roasted poultry version. If these are maillard compounds being formed, is it possible that roasting and prolong concentrated simmering could produce the same compounds?

#2 Harold McGee

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Posted 11 November 2004 - 03:04 PM

Excellent observation and experiment! Yes, we normally think of browning reactions as a high-temp, dry process, but when the amino acids and sugars are sufficiently concentrated—or the cooking time long enough—they occur at sub-boiling temperatures and in liquids. Another example is the wort—the boiled extract of malt and grains—in beer making. And the white of eggs turns tan when simmered very gently for hours (Middle eastern beid hamin) thanks to the protein and a trace of glucose.