1 ½ cups, plus ½ tablespoon granulated sugar, divided
1 teaspoon salt, divided
¾ cup unsalted butter, divided
2 ounces cream cheese, cold and cut into 1-inch chunks
¼ cup cold water
4 large eggs
1 cup buttermilk
2 teaspoons vanilla extract
⅓ cup unsweetened cocoa powder
Directions
In a food processor, add 1 ½ cup of flour, ½ tablespoon of granulated sugar, and ½ teaspoon of salt. Pulse together for a few seconds to combine.
Cut ¼ cup of the butter into 1-inch chunks. Add the cut-up butter and cream cheese to the food processor, and pulse together until the mixture resembles large peas.
Add the water to the food processor, and pulse until the dough starts to come together, but before it fully forms a ball. Turn the dough onto a clean surface, and form it into a ball. Wrap it in plastic wrap, and chill it for at least 1 hour.
Once the dough is chilled, remove it from the fridge, and let it sit at room temperature for 5 to 10 minutes. Place the chilled dough on a lightly floured surface. Use a rolling pin to roll out the dough into a 12-inch circle. Gently transfer the rolled-out dough onto a 9-inch pie plate. Press down to line the pie dish with the dough.
Preheat oven to 350 F. Microwave the remaining ½ cup butter until melted, then let it cool.
In a large bowl, whisk together the melted and cooled butter, eggs, buttermilk, vanilla extract, cocoa powder, remaining flour, sugar, and salt until smooth.
Pour the filling into the prepared pie crust, and bake for 50 to 55 minutes, until the center is set, and the pie is golden brown. Move to a wire rack to cool completely. Slice and serve.