01 - Line a large baking sheet with parchment paper or a silicone baking mat. Arrange graham cracker pieces in a single even layer with edges touching.
02 - In a medium saucepan over medium heat, melt the butter. Add brown sugar, maple syrup, vanilla extract, and kosher salt. Bring to a gentle boil, stirring constantly, and simmer for 2 to 3 minutes until the mixture thickens and turns glossy.
03 - Pour the hot caramel evenly over the graham cracker layer, spreading carefully with a spatula to coat all pieces.
04 - Sprinkle the toasted chopped pecans evenly over the caramel. Bake in a preheated oven at 350°F for 8 to 10 minutes until the caramel is bubbling.
05 - Remove from the oven and immediately scatter chocolate chips evenly across the surface. Let sit for 3 to 4 minutes, then spread the melted chocolate into a smooth even layer using an offset spatula.
06 - Sprinkle lightly with sea salt if desired. Allow to cool completely at room temperature or refrigerate for faster setting.
07 - Once fully set, break into irregular pieces and store in an airtight container for up to one week.