Yes, it is true that the pressure releasing time is also a significant part of the cooking process when using an Instant Pot or any other electric pressure cooker. During pressure cooking, the Instant Pot creates a sealed environment where the pressure increases, raising the boiling point of water and allowing food to cook faster.
When the cooking time is complete, and you turn off the heat, the Instant Pot needs some time to release the built-up pressure before you can safely open the lid. There are two main methods of pressure release:
Natural Pressure Release (NPR): In this method, you allow the Instant Pot to release pressure on its own without any active intervention. This can take anywhere from a few minutes to 20-30 minutes or more, depending on the contents of the pot and the cooking time.
Quick Pressure Release (QPR): This method involves manually releasing the pressure using the venting valve. It allows the steam to escape rapidly, reducing the pressure within a few minutes.
The pressure releasing time is an integral part of the cooking process because the food continues to cook during this phase. As the pressure decreases, the temperature inside the Instant Pot also decreases, but it remains much higher than atmospheric pressure. The cooking process essentially extends until the pressure has fully released.
Certain foods, like meat, benefit from a natural pressure release as it allows the fibers to relax gradually, resulting in a more tender texture. Delicate foods like vegetables may require a quick pressure release to avoid overcooking.
Recipes for the Instant Pot typically take into account both the cooking time under pressure and the pressure release time to ensure that the food is cooked to perfection. It's essential to follow the recommended pressure release method mentioned in the recipe to achieve the desired results for your dishes.