Preheat the oven to 300ºF (150ºC) and line a baking sheet with parchment paper.
Mix together the sugars, cinnamon, and salt in a small bowl.
In a second larger bowl, stir together the nuts and egg white until the nuts are well coated.
Sprinkle the sugar mixture over the nuts and stir everything together until the nuts are covered in the sugar mixture.
Spread the nuts into a single layer on the prepared baking sheet.
Place the sheet in the oven and bake for 35 to 40 minutes, stirring the nuts every 10 minutes, until the sugar coating is glossy and dark golden. Remove the nuts from the oven.
Cool them completely on the baking sheet set on a wire rack before serving or storing in containers with airtight lids.