Preheat the oven to 175°C

Mash the bananas with a fork until they are completely smooth. Stir the melted butter.

Add beaten eggs, vanilla extract, cinnamon and nutmeg. Mix it with a spoon.

Mix in the flour and baking powder.

Pour the batter in your butter greased baking pen. Put the walnuts on the top and bake it for 50 minutes.