Line a loaf pan with butter and sprinkle over with flour or breadcrumbs.

Puree the bananas with a fork or the blender.

Mix to combine the sugar with the soft butter.

Add eggs and mix again.

Mix in the bananas.

Stir in flour and baking powder.

Then the chopped walnuts.

Pour the batter into the pan. Make sure there is enough space for the cake to rise, so choose a bigger pan.

Bake in the oven for about one hour at medium temperature, until it browns well. Then remove and let cool in the pan for ten minutes.

After ten minutes, turn it out onto a plate and allow to cool completely.

Enjoy!