Prepare the Pie Crust: Mix together the flour, salt, and sugar in a large bowl until well combined. Add in the cold, cubed butter and mix until you achieve a crumbly texture. Gradually stir in the ice water until the dough comes together. Shape into a disk, wrap in plastic wrap, and chill for at least 30 minutes.
Preheat the Oven: Preheat your oven to 350°F (175°C).
Roll Out the Dough: Remove your dough from the refrigerator and roll it out into a circle large enough to fit your 9-inch pie pan. Transfer the rolled-out dough into your prepared pie pan and prick the bottom with a fork.
Prepare the Filling: In a separate bowl, whisk together corn syrup, brown sugar, cocoa powder, and eggs until smooth. Stir in vanilla extract, pecan halves, and chocolate chips.
Assemble and Bake: Pour the filling mixture into the prepared pie crust. Bake for 50-60 minutes or until set.
Cool and Serve: Allow the pie to cool on a wire rack for at least two hours before slicing.