Spray 9x13 pan with Pam. Line the pan with graham crackers. Break to fit if needed. Bring butter,brown sugar, coffee and nuts to a boil and then cook over medium heat for 5 minutes. Pour and spread over crackers. Let cool about 5 minutes, then Sprinkle chocolate chips over the top and spread as they melt. Sprinkle the sea salt or nuts over the melted chocolate as desired.
You will use one sleeve (package) of crackers from the box of crackers. There seems to be a few left that have to be nibbled on while I cook the toffee:)