In a large bowl, whisk together brown sugar, flour, salt until combined.
In a separate bowl, combine the corn syrup, eggs, melted and cooled butter, vanilla and maple syrup.
Add the wet ingredients to the dry ingredients, mix well.
Stir in roughly chopped pecans and butterscotch chips.
Spread evenly over partially baked crust.
Bake for 30-35 minutes, until filling is set.
Allow to cool completely before refrigerating for 1 hour. Cut into bars and enjoy!