Preparation

• Start by making brown butter by heating the butter in a saucepan over low heat. Stir regularly until it turns brown and develops a nutty aroma. Remove from heat when it starts to brown, and let cool.
• Mash the ripe bananas in a mixing bowl with a fork.
• Add the eggs, both sugars, vanilla, baking soda, and salt, and mix well.
• Add the cooled brown butter, mix again, then add the flour.
• After adding the flour, mix gently and briefly to keep the cake soft; it should just be combined.
• Finally, fold in the chocolate chips and walnuts.
• Pour the mixture into a high cake pan lined with baking paper.
• Preheat the oven to 180°C and bake for about 50 minutes. Check with a wooden skewer; it should come out clean when the cake is done.