1. Preheat your oven to 350°F (175°C). If using a homemade pie crust, roll it out and fit it into a 9-inch pie pan.
2. In a large mixing bowl, whisk together the granulated sugar, brown sugar, and melted butter until smooth.
3. Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract.
4. In a separate bowl, sift together the all-purpose flour, cocoa powder, and salt. Gradually add this to the wet mixture, stirring until just combined.
5. Fold in the chocolate chips and half of the pecan halves.
6. Pour the brownie mixture into the prepared pie crust, smoothing the top with a spatula.
7. Arrange the remaining pecan halves decoratively on top of the brownie batter.
8. Bake in the preheated oven for 40-45 minutes, or until the brownie layer is set and a toothpick inserted into the center comes out with only a few moist crumbs.
9. Allow the pie to cool completely on a wire rack before slicing and serving.

Remember, patience is key here — letting the pie cool ensures that the layers set properly, making it easier to slice.