Preheat your oven to 425°F (220°C).
Prepare Sweet Potatoes:
Peel the sweet potatoes and cut them into evenly sized fries.
Coat with Oil and Seasonings:
In a large bowl, toss the sweet potato fries with olive oil, paprika, garlic powder, onion powder, cayenne pepper (if using), salt, and pepper. If you desire extra crispiness, toss the fries with cornstarch.
Arrange on Baking Sheet:
Arrange the seasoned sweet potato fries in a single layer on a baking sheet lined with parchment paper. Ensure there is space between the fries for even crisping.
Bake in the preheated oven for 25-30 minutes, flipping the fries halfway through the cooking time. Bake until the fries are golden brown and crispy.
Garnish and Serve:
Once baked, remove the sweet potato fries from the oven. Garnish with fresh parsley or cilantro if desired. Serve immediately.