Preheat Oven To 350°F (175°C) And Grease Loaf Pan.
Cream Butter, Sugar, And Brown Sugar In A Large Bowl.
Incorporate Eggs One At A Time, Then Add Vanilla, Buttermilk, And Bananas.
In Another Bowl, Combine Flour, Baking Soda, And Salt. Gradually Mix Into Banana Mixture.
Gently Fold In Pecans. Transfer The Batter To The Pan, Smoothing The Top.
Bake For 60-70 Minutes Or Until A Toothpick Inserted Comes Out Clean.
Cool Bread In Pan For 10 Minutes, Then Move To A Wire Rack For Complete Cooling.