How long does it take to stew potatoes in a pressure cooker? 1. It only takes 6 minutes to stew potatoes in a pressure cooker. Exhaust the boiling valve for about 5 minutes and then turn off the gas. Wait until the valve falls down and the potatoes will stew. It's very soft. Do not stew potatoes in a pressure cooker for more than 10 minutes, otherwise the potatoes will be stewed to pieces. If the potatoes are stewed with other meat, they need to be added 15 minutes before serving. 2. Stewing potatoes is actually helpful for losing weight. Potatoes are rich in vitamins, vitamins, calcium, mineral elements, etc., which are easy to digest, are also very nutritious, and can provide the body with a lot of energy.