1Preheat oven to 375 degrees. Line a 15x10 baking pan with foil leaving a 2 inch overhang at each end.
2Line bottom of pan with graham crackers. Will be a very tight fit.
3Melt butter in a small saucepan over low heat, add brown sugar and salt. Cook, whisking entire time, until mixture is smooth and combined well. About 1 minute. DO NOT LET THIS MIXTURE BURN.
4Pour over crackers, spreading evenly and bake in the middle rack until golden brown and bubbly. About 10 minutes.
5Remove from oven and gently scatter chocolate chips evenly over crackers and place back in over for another minute until chocolate is soft.
6Remove pan from oven and gently spread chocolate evenly over crackers with offset spatula.
7Sprinkle nuts evenly over chocolate and cool crackers on a rack for 30 minutes. Or if you prefer, you can freeze 10-15 minutes. If you choose to freeze this make sure you press the nuts into the chocolate so they stick.
8Carefully lift crackers from pan by grasping both ends of the foil, then peel foil from crackers. Break crackers into serving pieces and enjoy!