Place sweet potato fries in a large bowl and cover with cold water. Soak for at least 60 minutes.
Pour 1 tablespoon oil on a large rimmed baking sheet and brush evenly with a pastry brush.
Place the greased pan into the oven while the oven is preheating to 425 degrees.
Drain sweet potatoes from water and dry thoroughly, with a clean kitchen towel.
In a gallon size bag, toss cornstarch with garlic powder, onion powder, and paprika. Add fries and toss to coat.
Carefully remove the heated pan from oven.
Take fries out of the mixture, shaking off excess, and place evenly on the baking sheet, being sure to leave space around each fry. Drizzle with additional oil or nonstick cooking spray.
Bake for 20 minutes, then flip the fries, and bake for an additional 10 minutes.
Generously salt fries after they have cooked and serve.
Notes
Soaking the sweet potatoes is a MUST to remove excess starch from the potatoes, this tip will help tremendously in achieving crispy sweet potatoes.Doubling the recipe: You will need to prepare 2 baking sheets, as you don't want your fries to be over-crowded and steam on the baking sheet. Oil: Be sure to use canola, vegetable, peanut, or coconut oil to cook these sweet potato fries, as those oils have a high smoking point which is necessary when baking at such a high temperature. Seasoning Options: Use any seasonings you like in the coating--just be sure it is salt-free.Meal Prep: You can soak your cut sweet potatoes in cold water in the fridge for up to 3-4 days.