Start by preheating your oven to 425°F (220°C). A hot oven is crucial for achieving crispy edges.
Wash and peel the sweet potatoes. Once peeled, cut them into even-sized strips, about 1/4 inch thick.
In a large bowl, combine the olive oil, cornstarch, garlic powder, paprika, black pepper, and salt. Mix well to form a paste.
Add the sweet potato strips to the bowl and toss until they are well-coated with the mixture.
Line a baking sheet with parchment paper. Spread the sweet potato fries in a single layer.
Place the baking sheet in the preheated oven and bake for 25-30 minutes, flipping halfway through.
Once golden brown and crispy, remove from the oven and let cool for a few minutes before serving.