line a 9 by 13 inch baking pan with parchment and lightly grease
mix graham cracker crumbs butter sugar and salt until evenly moistened then press firmly into the pan.
Bake and finish
pour sweetened condensed milk evenly over the crust
sprinkle chocolate chips then toffee bits and pecans if using and press lightly so toppings adhere
bake until edges are golden and center is set 25 to 30 minutes
cool completely then chill 30 to 60 minutes and cut into bars.
Notes
1. Line the pan with parchment for easy removal. Chill before slicing for cleaner cuts. Swap pecans with walnuts or omit nuts. Use milk chocolate chips for a sweeter flavor