Preheat oven to 300℉ and line a sheet pan with parchment paper.
- Add the egg white and vanilla to a large mixing bowl and whisk until it’s frothy.
- Toss the pecan halves in the beaten egg white until they’re evenly coated.
- In a separate bowl, whisk together the remaining dry ingredients until combined.
- Dump the sugar and spice mixture into the bowl of pecans and stir until evenly coated.
- Spread the pecans on the parchment-lined baking sheet in a single layer. Bake at 300℉ for 30 minutes, stirring halfway through. You can lift the parchment paper and gently pull it toward the center of the sheet pan to help mix the pecans. Carefully lift it toward the center and repeat on all 4 sides of the pan.
- Allow pecans to cool completely. They will crisp up as they cool.
Store in an airtight container for up to a month.