Preheat oven to 350°
Mix wet ingredients (except for the milk) first and mix by hand.
Do not over mix batter at any time.
Smashed the ripe bananas in a large bowl with a potato masher.
Use a spoon to combine melted butter, whisked egg and vanilla with the bananas.
Fold in the flour, coconut, baking soda, crushed walnuts, salt, brown sugar, butter and cinnamon.
Add 1/4 cup of the milk first, then mix with spoon by hand.
Slowly add remaining milk if the batter is too thick. You'll want a thicker consistency but not too thick.
No need to stir hard, just fold in and incorporate all ingredients until combined.
Fill non stick muffin tins (or paper liners) 3/4 of the way up.
Sprinkle with brown sugar, crushed walnuts and banana chips and pop in the oven.
Bake for 25 - 30 minutes.
Check the center of the muffin with a toothpick. If it comes out clean and the tops are browned they're ready!