Preheat your oven to 170° and line your muffin tray with cases
Mash your bananas and add your eggs, milk and oil. Whisk until combined
Sieve your flour, sugar and baking powder into your banana mixture. Stir until you have a batter
Add your salt, chocolate chips and walnuts
Spoon your batter into your cases
Bake for 22 minutes or until a skewer comes out clean
Wait to cool, then enjoy!