Preheat pan or pressure cooker on medium low flame.

In a bowl peel the banana and mash it with a fork.

To that add in sugar, oil, milk, vanilla and vinegar.

Mix well until combined.

Mix together flour, baking powder, baking soda and sift it thrice in another bowl.

Add it to the banana mix and mix gently with a fork until combined. Do not over mix.

Now add the chopped walnuts reserving a few for the topping.

Gently fold them in.

Grease, line and dust a 6″ cake tin.

Transfer the batter and level the top.

Top it with the remaining walnuts.

Bake in the preheated pan for 40 – 50 minutes or until a tooth pick inserted comes out clean.

Cool on wire rack for 10 minutes.

Flip it out, remove the baking paper and return the cake to the wire rack.

Cool it completely before slicing.

Serve it with a cup of hot coffee or tea.