Lock the lid on the cooker. Bring up to full pressure and cook for 25 minutes. After 25 minutes remove from heat and let pressure drop naturally. Now the chicken is ready to eat.his is so fast. Place the cooking rack in the bottom of your cooker (I recommend the Presto 6-Quart Stainless Steel model). Add 1 to 1 and 1/2 cups of water, or whatever the pressure cooker manufacturer recommends. Rinse off the chicken with cool water and place in the pan, breast side up.