In a mixing bowl, whisk the flour, salt, and baking powder. Set aside.
In a large mixing bowl, mash the bananas with a fork. You can also use a handheld or stand mixer for that if you prefer.
Add one egg and mix until well incorporated.
Beat in the sugars, vanilla extract, and melted butter.
Turn the mixer to a low speed and carefully and slowly add the dry ingredients into the wet ingredients until no more flour pockets are visible. Don't mix for too long, or the batter will get rubbery. (You don't necessarily need to use a mixer in this recipe; a wooden spoon works perfectly fine, too. )
Fold in the nuts and chocolate chips.
Pour the batter into the prepared loaf pan and bake for 50-55 minutes. The loaf is done if a toothpick comes out clean without any raw batter sticking to it. Remove from the oven and allow the bread to cool.
Notes
I love to eat this Banana Bread when it is still slightly warm. But it actually tastes the best on day two when all the flavors have settled together.Feel free to leave out the walnuts if you are not a fan of them, or substitute them with a nut of your liking.