Line a cookie sheet with the graham crackers, you might not use all of them in two sleeves and that’s okay!
In a heavy bottom sauce pan, melt the butter over low heat and add the brown sugar. Now, raise the temperature to medium and continuously whisk.
As soon as the mixture comes to a boil, set a time for one minute. Keep whisking!
When the timer sounds, take it off the heat and add the pecans and pie spice. Whisk until the spice is combined and pour this over the graham crackers as evenly as possible. Do NOT spread the mix with a spatula or it will just get all sticky.
Place the cookie sheet into the oven and cook for 20 minutes. Let cool completely on a wire rack. When cool, break into pieces and enjoy!