Preheat the oven to 425°F (220°C). Line a large baking sheet with parchment paper. Wash and scrub the sweet potatoes thoroughly, then pat them completely dry. Cut each potato lengthwise into halves, then slice each half into evenly sized wedges.
Place the sweet potato wedges in a large mixing bowl. Add the olive oil, garlic powder, smoked paprika, Italian seasoning, salt, and black pepper. Toss until every wedge is evenly coated with the oil and seasonings.
Sprinkle the freshly grated Parmesan over the seasoned wedges. Toss gently to distribute the cheese, making sure it sticks to the surfaces of the sweet potatoes.
Spread the wedges across the prepared baking sheet in a single layer. Arrange them with a little space between each piece to allow the hot air to circulate. Avoid overcrowding the pan, as this can make the wedges soft instead of crispy.
Place the baking sheet in the preheated oven and bake for 25 to 30 minutes. Turn the wedges halfway through cooking so they brown evenly on both sides. They are ready when the edges are golden and lightly crisp, and the centers are fork-tender.
Remove the wedges from the oven and let them rest for a couple of minutes. Sprinkle with freshly chopped parsley and a little extra Parmesan if desired. Serve warm with your favorite dipping sauce.