The Food Lab: Better Home Cooking Through Science

To do it, cut your potatoes and rinse them in
water, then carefully dry. Put them in your wok or
Dutch oven and cover with oil by an inch or two.
Cook the fries over medium heat until they are very
soft, about 35 minutes, stirring once or twice in the
first 5 to 10 minutes. Increase the heat to high and
let them continue to cook for 5 minutes undisturbed,
then give them a few gentle stirs and keep cooking
until golden brown and crisp, about 10 minutes
longer. Drain on a paper-towel-lined plate and
immediately season with salt.