Preheat oven to 350°F. Line an 11x15" baking sheet with parchment paper. Arrange the graham crackers touching side by side in a single layer across the sheet. Break some of the pieces to fit, if necessary. Set aside.

In a medium saucepan, heat the butter over med-high heat. Once melted, add the brown sugar and salt and whisk to combine. Continue cooking until the mixture reaches a boil, whisking constantly. Let boil for about 2 minutes, then remove from heat and pour evenly over the graham crackers. Use a rubber spatula or the back of a large spoon to spread the mixture evenly over the top of the crackers.

Remove pan from the oven and immediately sprinkle the chocolate chips evenly across the top (try to spread them out better than I did 😒) Place the baking tray back into the still hot oven to help the chocolate melt quickly and let sit in there for about 3-5 minutes. Then, remove from oven and use the back of a large spoon or a rubber spatula to spread the melted chocolate around.

Sprinkle the chopped pecans (or other topping of your choice) on top of the melted chocolate. Let sit for around 2 hours, then cut or break into pieces and serve.