In a bowl take 170 gm overripe bananas. Using a fork or potato masher, mash them.
Add 100 gm brown sugar and 60 ml of any unflavoured oil.
Keep whisking until sugar dissolves completely.
Add ½ tsp of essence and mix.
Take a sifter and add all the dry ingredients into it. Sieve everything.
Mix dry and wet ingredients. Keep adding milk in-between.
Add walnuts and chocolate chips to the prepared batter.
The batter should be thick so adjust the consistency accordingly.
Pour the prepared batter into muffin molds up to 3/4th.
Bake them in a preheated oven at 180 °C for 25 minutes.
Once baked, take the muffins out from the oven and serve them.