How To Cook Sweet Potato Fries In Oven. Line two baking sheets with foil and coat with cooking spray. In the toaster oven, set the toaster oven to it’s oven setting at 400 degrees.
Bake in the preheated oven until golden, about 15 minutes. Preheat the oven to 200ºc/400ºf/gas 6. Wash 2 large sweet potatoes under cold running water, scrubbing well with a scrubber to get rid of any dirt (there’s no need to peel them) cut each sweet potato in half lengthways, cut each half in half lengthways, then.
Instead of using a baking sheet, use a piece of heavy duty aluminum foil and make a little lip around the edges.
Preheat the oven to 425°f. Line two baking sheets with foil and coat with cooking spray. Place sweet potato fries on a baking sheet. Transfer them to a large baking sheet.