Preheat oven to 425.
Mix brown sugar and pecans until well combined.
Line a medium size baking sheet with parchment paper.
Cover the sheet with pepperoni slices - do not overlap.
Sprinkle the brown sugar nut mixture evenly over the pepperoni slices.
Bake for 6-8 minutes.
DO NOT OVER BAKE
Remove from oven and allow sheet to cool on baking rack. Your pepperoni will continue to crisp.