01 - Preheat oven to 350°F. Line a 13x9 inch rimmed baking sheet with parchment paper.
02 - Lay graham crackers in a single layer, covering the entire bottom of the baking sheet.
03 - Melt butter in a saucepan over medium heat. Stir in brown sugar, maple syrup, and salt. Bring to a gentle boil while stirring constantly, then simmer for 2 to 3 minutes until the mixture thickens slightly.
04 - Remove saucepan from heat and stir in vanilla extract and chopped pecans until evenly coated.
05 - Pour the hot pecan mixture evenly over the arranged crackers, spreading gently with a spatula to cover the surface.
06 - Bake for 15 to 18 minutes until the topping is bubbling and turns a rich golden color.
07 - Remove from oven and let cool for 10 minutes. Drizzle melted chocolate over the surface if desired.
08 - Allow the bark to set completely at room temperature or refrigerate for faster results. Break or cut into rustic pieces for serving.