01 - Preheat the oven to 425°F (220°C) and line a large baking sheet with parchment paper.
02 - Cut each potato in half lengthwise, then slice each half into 4 to 6 wedges depending on size.
03 - Place the potato wedges in a large bowl; add olive oil, sea salt, smoked paprika, garlic powder, black pepper, onion powder, and cayenne pepper if using. Toss thoroughly to coat evenly.
04 - Spread the wedges in a single layer, skin side down, on the prepared baking sheet.
05 - Bake for 30 to 35 minutes, flipping the wedges halfway through, until golden brown and crisp.
06 - Remove from the oven, sprinkle with fresh parsley and grated Parmesan if desired, and serve immediately.