01 - Preheat oven to 325°F. Line a baking sheet with parchment paper.
02 - In a medium bowl, mix pumpkin seeds, olive oil, smoked paprika, ground cumin, cayenne pepper if using, garlic powder, black pepper, and sea salt until evenly coated.
03 - Spread the coated seeds evenly in a single layer on the prepared baking sheet.
04 - Roast for 18 to 20 minutes, stirring once halfway through, until seeds are golden and crisp.
05 - Remove from oven and allow seeds to cool completely before serving or storing.