Make the crust. Preheat the oven to 350 degrees. Melt butter in saucepan. Remove from heat & add both sugar and stir to combine. Stir in flour. Cool 15 minutes (dough will be warm). Spray 10 inch pie pan with non- stick spray. Press dough onto bottom & up the sides of pie pan. Bake for 10 minutes - the crust will not be fully baked; it will go back into the oven once the pie is filled.
Make the filling. Beat eggs, corn syrup, sugar, butter and vanilla in a large bowl until well blended. Stir in pecans.
Pour filling over hot crust; spread evenly.
Bake 40-45 minutes at 350°F until filling is firm around the edges and slightly firm in center. Cool completely on wire rack before serving.