1. Preheat oven to 350 degrees. 2. Chill unbaked pie crust in freezer for 15 minutes before using. 3. cream the butter with an electric mixer on medium speed. Gradually beat in the sugars. 4. Add the eggs individually, beating well each time. 5. Beat in the vanilla, then the flour and salt until well blended. 6. Blend in the milk (don't worry if the filling looks a little lumpy at this point) and finally, stir in the chocolate chips and walnuts. 7. Pour filling into the chilled shell, smoothing it out with a spoon. 10. Cool pie on a wire rack. Serve warm, at room temperature, or chilled.