Unroll a refrigerated pie crust into a 9" glass pie plate or fit a homemade pie dough of your choice. Place in the refrigerator to chill while you mix the filling.
In a large bowl mix the two sugars and the flour and set aside.
In a large measuring cup or bowl add the butter, eggs, milk and vanilla and beat to combine.
Add the butter mixture to the sugars and flour and whisk to combine.
Fold the pecans in gently just until distributed.
Pour the mixture into a prepared pie crust.
Bake 40-50 minutes until the center just jiggles but the perimeter of the pie is firm. Tent the pie with foil if it begins to get too dark. Check it at about the 25 minute mark and cover if needed.