 Liquid can be added inside the container when pressure cooking foods such as rice, which need to absorb liquid in order to cook properly.The flavor of some foods, such as meat and onions, can be improved by gently cooking with a little pre-heated cooking oil, butter or other fat in the open pressure cooker over medium heat for stove-top models (unless the manufacturer advises against this) before pressure cooking, while avoiding overheating the empty pressure cooker not heating the empty cooker with the lid and gasket in place to avoid damage.Electric pressure cookers usually have a "saute" or "brown" option for frying ingredients.