Mash the bananas and add the bicarb of soda to activate the bananas.

Put the sugar and butter into a mixing bowl and cream it well. Add the egg, vanilla essence and baking powder.

Add the flour and fold in the bananas. Fold mixture and place it into a greased dish or a loaf pan covered with baking paper (optional).

Bake at 180*C for about 1 hour or until knife comes out dry.