Grease and line a 13-by-9-inch baking sheet with baking parchment paper.
Break the sheets of graham crackers on the perforated lines into smaller 1-by-3-inch rectangles.
Lay them out on the prepared baking sheet as close together as possible, covering the entire sheet.
Melt butter and sugar in a saucepan over medium heat.
Once the butter and sugar mixture comes to a bubble, add the chopped pecans and stir together.
Pour the mixture evenly over all of the crackers.
Bake in a preheated 350 degree oven for 10 minutes.
Cool for 30 minutes.
Break or cut into pieces to serve