Preheat oven to 350.
Cover a 13x9 baking dish with aluminum foil and create a bottom layer with graham crackers, covering the pan completely.
Melt butter in a medium pot over medium high heat.
Once melted, add in brown sugar, stir. Then add in pecans.
Bring to a boil, stirring constantly for 5 minutes.
After 5 minutes, spread toffee mixture evenly over crackers.
Bake at 350 for 10 minutes.
Let cool completely, chop and enjoy!
