Preheat oven to 325°.
Roll out pie crust and press into 9 inch pie pan. Crimp the sides, and put the crust to the side.
In a large mixing bowl, crack two eggs. Beat until foamy.
Add flour, sugars, salt, and vanilla to the eggs and mix until smooth.
Add butter to the filling and mix until smooth.
Add chocolate chips and stir until combined.
Pour filling into pie crust and smooth. Optionally, you can cover the edges of the pie crust with foil to prevent overbrowning.
Bake pie at 325° for 55-60 minutes. If using foil, remove 15 minutes before the end of baking. Pie is done when a knife inserted into the pie half-way between the crust and the center comes out clean.
Allow pie to cool for 5-10 minutes before serving.