Preheat oven to 350* F. Line a large, rimmed baking sheet with foil. In a small bowl, combine sugar, chili powder, cumin, cinnamon, salt and cayenne pepper (if using).
Spread pepitas on prepared baking sheet, in a single layer. Roast in oven for 10 minutes.
Toss pepitas in oil and then sprinkle chili powder mixture, tossing to coat. Pour pepitas back on prepared baking sheet and bake for 5 minutes, or until pepitas are browned. Let cool and enjoy!
Recipe by Alida's Kitchen at https://www.alidaskitchen.com/2013/09/29/sweet-and-spicy-pepitas-pumpkin-seeds/