Preheat Oven:
Preheat your oven to 350°F (175°C).
Prepare Pie Crust:
Place the unbaked pie crust into a pie dish, trimming and crimping the edges as needed.
Make the Brownie Filling:
In a large mixing bowl, whisk together the melted butter, granulated sugar, and brown sugar until smooth.
Add the cocoa powder, flour, and salt, and mix until combined.
Whisk in the eggs, one at a time, followed by the vanilla extract.
Fold in the chocolate chips.
Assemble the Pie:
Pour the brownie batter into the prepared pie crust, spreading it out evenly.
Bake:
Place the pie dish on a baking sheet and bake in the preheated oven for 40-45 minutes, or until the top is set and a toothpick inserted into the center comes out with a few moist crumbs.
Cool and Serve:
Allow the pie to cool on a cooling rack for at least 1 hour before slicing and serving. The pie will set as it cools, creating a gooey center.