by Kendall Hurst
A pressure cooker is a big pot with a sealed lid, when the lid is
sealed and locked it heats the cooking liquid to a boiling point which
turns to steam and since the lid is sealed it builds up pressure. The
temperature will vary with the different levels of pressure of the
steam. Pressure is measured in pounds per square inch, some models only
have one setting which is high (most foods are cooked on the high
setting) and some have a high and a low setting. The hotter the setting
the faster the food cooks.
High altitude pressure cooking
When cooking at high altitudes...