Step 1

Preheat oven to 425 degrees F (220 degrees C). Line a baking sheet with aluminum foil; spray with cooking spray.

Step 2

Place sliced potatoes in a colander; sprinkle sugar over potatoes. Set aside until liquid is released from potatoes, 20 to 30 minutes. Drain liquid and dry potatoes well.

Step 3

Mix potato slices, olive oil, garlic powder, salt, and black pepper in a resealable bag until evenly coated. Spread coated potato slices in a single layer, leaving space around each potato, on the prepared baking sheet.

Step 4

Bake in the preheated oven for 20 minutes; flip fries and continue baking until crisp and browned, about 20 more minutes.