Preheat the oven to 425 degrees Fahrenheit.  Line two baking sheets with parchment paper and set them aside.

Using a sharp kitchen knife, cut sweet potatoes into even sticks, about ¼ inch each.

In a large bowl sprinkle cornstarch and kosher salt on top of the fries, mix well, and make sure to coat each fry.

Divide fries evenly between the two baking sheets and spread evenly.  It is important not to overcrowd the baking sheet if you want crispy fries.

Drizzle each baking sheet with 1 tablespoon of oil Coat fries with oil, be sure that no cornstarch spots remain.

Bake fries for 10-12 minutes rotate the pan position and flip the fries and continue baking for another 10-12 minutes.

While baking, combine garlic powder, black pepper, and cayenne pepper in a small bowl and mix.

Fries are done when the outside turns from a shiny wet orange color to a more matte orange.

Remove from oven and sprinkle with spice mixture, toss to coat fries in seasoning.