Preheat oven to 425 degrees F.

Make pie crust. Combine flour with salt and cold butter using a pastry cutter until every piece of butter is covered in flour. The mixture should resemble coarse sand. Slowly add ice cold water one tablespoon at a time until a dough comes together. Shape into a disc and wrap in plastic wrap. Let chill in the fridge for at least one hour or overnight.

Line pie dough with parchment paper and fill with baking weights. Bake for 15 minutes. Remove from oven and remove parchment paper and baking weights. Bake for another 10 minutes or until center is light golden brown. Remove from oven and let cool completely.

Reduce oven temperature to 350 degrees F.

Make pie filling. Whisk together eggs, corn syrup, brown sugar, bourbon, melted butter, molasses, vanilla, and salt until smooth. Stir in chopped hazelnuts and chocolate chips. Pour filling into pie crust. Bake for 50 minutes - 1 hour or until golden brown and edges are set. Remove from oven and let cool for at least 3 hours. Slice and serve.