Wash, then cut the potatoes into thin strips, or use a potato slicer.
Soak in a bowl of water for one hour.
Rinse well, then pat dry.
Heat about two inches of peanut oil in the bottom of your dutch oven on the stovetop to 365°F (you'll want enough oil to fully submerge the fries, but not so much that it can splatter out the top)
Add the fries carefully using a slotted skimmer.
Fry for five minutes, stirring often.
Remove to a paper towel-lined plate to cool.
Add the fries back into the fryer along with the sugar and stir often to prevent the potatoes from sticking.
Once the potatoes are crispy, remove them to a plate to cool.
Salt and serve them warm.
Notes
Adding the sugar during the second fry is essential for a lasting crisp.If you don't have time to soak the fries or do a double fry, they will still turn out delicious, but not nearly as crispy.Also, oil temperature is very important. Try to keep it as close to 365°F as possible.