Coat the walnuts with some flour, this will stop them from sinking to the bottom.

Add the wheat bran and mix. This is optional, but increases the nutritional value of the cake.

Add a little milk to adjust the consistency of the batter if it is too thick to pour. Pour the batter in the prepared tin. Add some whole walnuts on the top if you want.

Bake it for 40 minutes at 180 deg C or till a toothpick inserted comes out clean. Every oven is different, so check after 35 minutes.

Note
1. You can use white sugar instead of brown sugar. Brown sugar gives a nice caramelised colour and flavour.
2. Cinnamon and vanilla are only for flavour, you can add both or avoid either of it. You can also add either nutmeg or cardamom according to your taste.
3. Amount of sugar can be adjusted according to the sweetness of the bananas and your taste.
4. Adding walnuts is your choice. You can replace them with other nuts like almonds or completely avoid any nuts.