Preheat the oven to 425°F (220°C). Line a baking sheet with parchment paper or a silicone baking mat.
Peel the sweet potatoes and cut them into even-sized fries, about 1/4 to 1/2 inch thick.
In a mixing bowl, toss the sweet potato fries with olive oil, salt, pepper, and any additional spices you prefer. Make sure the fries are evenly coated.
Arrange the sweet potato fries in a single layer on the prepared baking sheet, leaving some space between each fry.
Place the baking sheet in the preheated oven and bake for 25-30 minutes, or until the fries are golden brown and crispy. Flip the fries halfway through baking to ensure even browning.
Once done, remove the baking sheet from the oven and let the fries cool for a few minutes before serving.
Serve the crispy oven-baked sweet potatoes as a side dish or a tasty snack. Enjoy them plain or with your favorite dipping sauce.