Step 1: Preheat your oven to 350°F (175°C) to ensure even baking.
Step 2: In a large mixing bowl, combine the egg whites and water. Whisk until frothy.
Step 3: Gradually add the brown sugar, white granulated sugar, kosher salt, cayenne pepper, and cinnamon. Stir until a thick paste forms.
Step 4: Add the mixed nuts and fold into the sugary mixture until each nut is coated.
Step 5: Line a baking sheet with parchment paper and spread the coated nuts in a single layer.
Step 6: Bake for 25-30 minutes, stirring halfway through until golden brown.
Step 7: Remove from the oven and allow to cool completely on the baking sheet.