In a medium bowl, dissolve the sugar in warm water. Soak potatoes in water mixture for 15 minutes. Remove from water, and dry thoroughly on paper towels.
Heat oil in deep-fryer to 375 degrees F (190 degrees C). Add potatoes, and cook until golden, 5 to 6 minutes. drain on paper towels. Season with salt to taste.
Comment copied and pasted from someone else: For those who think it's odd to soak them in warm water...well the warm water is merely to dissolve the sugar. After the sugar is dissolved I add some ice and then do the soaking. These fries are the best. I have baked these (spraying with pam & seasoning w/ garlic salt) as well as fried them and they are always a hit.