2, sweet corn, also known as fruit corn, put in a regular pot to cook, usually after the water boils, cook 10-15 minutes or so can be cooked. If you put it in a pressure cooker, cook it for about 5 to 8 minutes after the pressure cooker comes on steam. You can increase the time according to the degree of tenderness of sweet corn, but not more than 20 minutes, otherwise the taste of sweet corn will decline, not so sweet and refreshing.