Beat eggs until frothy. Stir in the melted butter, brown sugar, white sugar, & flour. Fold in milk, vanilla extract, & pecans. Pour into the prepared pie crust.
Bake at 400 degrees for 10 minutes. Reduce heat to 350 degrees, & cook for about 45 more minutes. After it has been cooking for 20 minutes total, it would be a good idea to remove it from the oven & cover the crust with a pie crust shield or tinfoil to prevent burning.