Adjust an oven rack to the lowest position. Preheat the oven to 450 degrees F.
In a medium saucepan over medium heat combine the dark brown sugar, heavy cream, maple syrup, and molasses, stirring occasionally, until the sugar dissolves about 3-4 minutes. Remove from the heat and let cool for 5 minutes.
1 cup Dark brown sugar, 1/2 cup Heavy cream, 1 cup Maple syrup, 1 tbsp Molasses
Stir in the butter cubes, vanilla, and salt. Whisk in the egg yolks until incorporated.
1/4 cup Unsalted butter, 6 large Egg yolks, 1/2 tsp Kosher salt
Place the chopped pecans into the prepared pie crust. Carefully pour the pie filling over the pecans.
2 cups Pecans
Place the pie in the oven on the lowest rack and IMMEDIATELY reduce the oven temperature to 325 degrees F. Bake for one hour up to one hour and 15 minutes or until the filling is set. The middle will just barely jiggle.
Transfer to a wire rack and let cool for at least two hours. Then refrigerate for at least 3 hours or up to overnight. Bring to room temperature before serving.