Add cocoa powder, baking powder, baking soda and salt in the Bajra and sift them twice or thrice and keep aside.

Now put the oven on preheat at 200 degrees .

Take a deep bowl and mash banana, add vanilla and then jaggery and mix it till it all blends well.

Now pour the oil into the banana mix and give it a good mix again. Once oil mixes well start adding the dry bajra mix gradually in parts and keep mixing in cut and fold method.

Once all the bajra mix it added and if the batter is too dry, which it would be , add some milk too and mix it again for a thick pouring consistency. Add the chopped walnuts and give one final mix.

Now layer a baking tray with baking sheet or grease it with oil and dust with flour. Pour the batter in the centre and tap it to spread evenly.

Sprinkle the almonds over the cake batter and bake it for 25 mins on 180 degrees. Do a quick knife test and if it comes clean then let it rest in over for another 10 mins and if it still gets some batter on knife bake it for another 5 mins. 

Serve with a glass of milk or enjoy with a hot coffee.