1. Preheat oven to 300°. Mix sugar, maple syrup, chile powder, and salt in a medium bowl. Add nuts and mix to coat well. Spread nuts on a nonstick baking sheet (or line sheet with parchment) in a single layer.
2. Bake nuts, stirring often, 20 to 30 minutes, or until liquid is mostly evaporated and nuts are golden inside (break 1 open to test). Let cool until crisp.
*Make ahead: Up to 1 week, stored in an airtight container at room temperature.
Note: Nutritional analysis is per 2-tbsp. serving.