Beat the melted butter and sugars for approximately 2-3 minutes, until it becomes pale.
Add the eggs, one at a time, beating until mixed.
Add the vanilla and mashed bananas and beat until mixed
Whisk the dry ingredients together and add to the wet mix. Fold in until JUST combined.
Fold in the nuts and chocolate chips.
Place the gooey thick batter into a loaf pan that has been greased / sprayed. I like to make a liner with parchment paper for easy lifting out of the pan. If you use parchment paper, lightly spray it as well.
Bake for 60-70 minutes (until a skewer comes out clean.)
Notes
* If you don't have buttermilk, take a tablespoon of milk and add 1/8 teaspoon of vinegar to it.