Preheat oven to 325 degrees. Line a standard size baking sheet with parchment paper or a silicone baking mat. Set aside.
In a bowl, whip the egg white till frothy, add the sugar, brown sugar, cinnamon, salt, and optional cayenne. Whisk together until smooth. Add the nuts and toss to coat.
Pour nuts onto prepared baking sheet. Place in oven and bake for 15 minutes, stirring every 5 minutes.
Remove from the oven and transfer to a large piece of parchment or wax paper. Use a spoon or small tongs to separate the nuts to prevent clusters from forming. Let dry for 20 minutes or until completely hardened. Store in an airtight container for up to 2 weeks.