Line a baking sheet with parchment paper or a silicone baking mat.
Spread graham crackers in an even layer onto the prepared baking sheet, covering the entire sheet.
In a medium saucepan, combine butter, sugar vanilla and salt over medium heat. Cook, whisking constantly, until butter has melted and mixture is almond brown in color, about 10-15 minutes.
Immediately spread the hot caramel mixture evenly over the graham crackers. Sprinkle with chocolate chips. After 1-2 minutes, spread the chocolate chips in an even layer until smooth. Sprinkle with pecans.
Let cool completely, about 2 hours. Break into pieces.