To do this, you can use frozen fries you have purchased or just peel up some potatoes and slice them (thick or thin, whatever you prefer). Once the fries are cut, soak them in a bowl of water with 2 tsp. of corn syrup. If you are soaking a lot of french fries, just add a bit more corn syrup. Place the bowl in the refrigerator for 30-45 minutes.
Remove, drain and heat your french fryer until it is nice and hot. Carefully drop in the french fries (a few at a time) and fry them for exactly 90 seconds. Remove from the hot oil and refrigerate for 15 minutes. After 15 minutes, add them to hot oil and fry them until done.
I know it sounds like a big ordeal but it is well worth the extra time and effort.