01 - Preheat the oven to 425°F. Line a large baking sheet with parchment paper.
02 - Cut the sweet potatoes into evenly sized sticks, about 1/2 inch thick.
03 - In a large bowl, toss the sweet potato sticks with olive oil, smoked paprika, garlic powder, black pepper, sea salt, and cayenne pepper (if using) until evenly coated.
04 - Spread the fries in a single layer on the prepared baking sheet, making sure they do not touch or overlap for maximum crispiness.
05 - Roast for 15 minutes, then flip each fry with a spatula. Roast for another 15 minutes, or until golden brown and crisp at the edges.
06 - Remove from the oven, sprinkle with extra sea salt if desired, and serve immediately.