Step 1

Place potatoes in a bowl and cover with water; let sit for 5 minutes. Drain and pat dry.

Step 2

Place potatoes in a bowl and cover with boiling water; add sugar and corn syrup and mix well. Place bowl in the refrigerator and let sit for 5 minutes. Drain and pat dry.

Step 3

Spread potatoes out in a baking dish, cover the dish with plastic wrap, and freeze for 30 minutes.

Step 4

Heat oil in a deep-fryer or large saucepan to 350 degrees F (175 degrees C).

Step 5

Working in batches, fry potatoes in hot oil for 2 minutes. Transfer to a paper towel-lined plate to dry and let cool for 15 minutes.

Step 6

Working in batches again, fry potatoes in hot oil until browned and crispy, 5 to 7 minutes. Season fries with sea salt.