Preheat your oven to 350℉. Melt the butter either on the stove or in a microwave-safe bowl. Set aside.
In a small bowl, whisk together the bourbon and flour until smooth to form a slurry. Set aside.
In a larger mixing bowl, lightly beat the eggs until the yolks are well-incorporated.
Add the sugars, syrup, and vanilla to the eggs and stir until well-combined. Add the butter (make sure it’s slightly cooled). Add the whiskey slurry.
Once the batter is fully combined, stir in the pecans and chocolate chips.
Pour into a chilled (but not frozen) pie crust. Bake for 50-60 minutes until the center has puffed up and is no longer liquid (it’s alright if it’s not fully set - it will set as it cools).