Add the butter to a saucepan over medium heat. Stir until brown specks form at the bottom and it smells nutty, about 3-5 minutes. Remove from heat.
In a large bowl, combine the maple syrup, brown sugar, vanilla, and eggs. Whisk vigorously for 1 minutes.
Add the salt, bourbon, and browned butter. Whisk vigorously for another 1 minute.
Add the coarsely chopped pecans into the pre-baked pie crust. Spread out evenly.
Evenly drizzle the melted chocolate over the pecans. If you prefer a less crunchy pecan pie, add only 2 1/2 cups chopped pecans.
Slowly drizzle the filling mixture over the chocolate and pecans, allowing it to seep through the pecans before adding more.
Bake for 20 minutes, then cover with aluminum foil to bake 20 minutes. Remove the foil to bake 10 more minutes, or until set in the center.
Let cool at room temperature for 2-4 hours to overnight. If prepping in advance, let completely cool then cover with foil to keep on the counter overnight.