Pressure cooking is a method of cooking in a sealed vessel that does not permit air or liquids to escape below a preset pressure. Because water's boiling point increases as the pressure increases, the pressure built up inside the cooker allows the liquid in the pot to rise to a temperature higher than 100 °C (212 °F) before boiling. The higher temperature causes the food to cook faster. Cooking times can be reduced by a factor of three or four. For example, shredded cabbage is cooked in one minute, fresh green beans take about five, small to medium-sized potatoes (up to 200 g) may be ready in five minutes or so and a whole chicken takes no more than twenty-five minutes. It is often used to simulate the effects of long braising or simmering in shorter periods of time.

A safety valve releases steam when the pressure exceeds the safety limit for the cooker; usually the steam pressure lifts a weighted stopper allowing excess pressure to escape. There is usually a backup pressure release mechanism that may employ a number of different techniques to release pressure quickly if primary pressure release mechanism fails. One such method is in the form of a hole in the lid blocked by a plug of low melting-point alloy. If internal temperature (and hence pressure) gets too high, the metal plug will melt, resulting in a release of the pressure.

An early pressure cooker, called a steam digester, was invented by Denis Papin, a French physicist, in 1679.

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pressure cooked and ready to turn into fiesta besns! Fyi pressure cookers rick! http://twitpic.com/v0irf
chickadeeprints (Heather Barnard) Thu, 24 Dec 2009 21:20:03 -0000
pressure cooked and ready to turn into fiesta besns! Fyi pressure cookers rick! http://twitpic.com/v0irf
@theclarkster haha they're like little pressure cookers or something! He is far more chilled now that he's unwrapped something, anything.
Lesley_SS (Lesley) Thu, 24 Dec 2009 08:44:34 -0000
@theclarkster haha they're like little pressure cookers or something! He is far more chilled now that he's unwrapped something, anything.
Pressure Cookers ROCK! Just cooked potatoes in 2 (that's right, 2) minutes. Why doesn't everyone use these things? Now to cook some chicken
AKStafford (Todd Stafford) Thu, 24 Dec 2009 05:12:22 -0000
Pressure Cookers ROCK! Just cooked potatoes in 2 (that's right, 2) minutes. Why doesn't everyone use these things? Now to cook some chicken
Word!! Target has pressure cookers?! Can u see if it's 10qt and let me know thanks soooooo much @NathanielBDavis
whitleygilbert2 (Sam Smarte) Wed, 23 Dec 2009 15:26:52 -0000
Word!! Target has pressure cookers?! Can u see if it's 10qt and let me know thanks soooooo much @NathanielBDavis
You staying home all day? If u go to the mall for ANY reason can u do me a favor & see if they have any pressure cookers?! @NathanielBDavis
whitleygilbert2 (Sam Smarte) Wed, 23 Dec 2009 15:21:56 -0000
You staying home all day? If u go to the mall for ANY reason can u do me a favor & see if they have any pressure cookers?! @NathanielBDavis
Check out the new Grow and Make TV episode on Pressure Cookers. http://bit.ly/4zOwUD
GrowAndMake (Will Johnston) Tue, 22 Dec 2009 01:40:11 -0000
Check out the new Grow and Make TV episode on Pressure Cookers. http://bit.ly/4zOwUD

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