Question: does in and out cook in peanut oil

Answer: No, In-N-Out uses the Kennebec variety of potato for its fries and prepares them on-site as opposed to purchasing them pre-made from other companies. The company's french fries are cooked in ``100% pure, cholesterol-free sunflower oil.'' Fries can also be cooked to order, with cooking times ranging from ``light'' to ``extra well done''.