Pre-heat oven to 350F / 180C
Grease a 9x5 loaf pan with butter or cooking spray
Puree bananas to a smooth pulp. Measure out 4 cups after pureeing and transfer to a wide bowl
Add melted butter. Mix well
Now add milk and vanilla to the above and mix again
Now add sugar, baking soda, and salt and mix until well combined
Finally add the flour in 3-4 additions, gently folding it in. Do not over mix once the flour is added to the batter
Now thrown in the chopped walnuts and give everything one or two final stirs
Transfer to the greased pan and tap once on the kitchen counter to get rid of air bubbles
Bake in the pre-heated oven for about 45-50 mins or until a skewer inserted into the centre of the loaf comes out with moist crumbs. If you feel like the top of the banana bread is browning too quickly, loosely cover the pan with some aluminium foil and continue to bake. I add a couple of slits in there so the hot air can escape
Once done, leave it in the pan for about 15 mins and then gently invert onto a wire rack to cool completely
Slice and serve toasted with some salted butter to enjoy it best