01 -
Preheat oven to 325°F and line a baking sheet with aluminum foil.
02 -
Lay graham crackers in a single layer to cover the lined baking sheet completely.
03 -
In a large heavy-bottomed saucepan, combine butter, granulated sugar, vanilla extract, and pecans.
04 -
Heat the mixture over medium-low, stirring continuously, until it comes to a gentle boil.
05 -
Allow mixture to boil for 3 minutes, stirring constantly to prevent scorching.
06 -
Carefully pour the hot pecan mixture evenly over the arranged graham crackers, smoothing with a spatula.
07 -
Transfer the baking sheet to the oven and bake for 8 minutes, until the topping is caramelized.
08 -
Remove from oven and allow to cool completely before breaking into bark pieces.