• Preheat the oven to 325F and line an 9x5 loaf pan with parchement paper.

Brown the butter

• In a medium saucepan, melt the better on medium heat. Once the butter melts fully and starts foaming, stir continuously to be able to see the color of the butter changing. You will smell a nutty aroma and notice the buter turning golden brown.
  1 stick butter
• Once the butter is golden brown remove it from the heat and set aside to cool for 15-20 minutes. You should have about 85g-90g of browned butter to bake with.

Make the brown butter banana bread

• In a bowl, mix the mashed bananas, granulated sugar, brown sugar, eggs, vanilla, milk, sour cream, and brown butter together until combined.
  2-3 bananas, 1/2 cup granulated sugar, 1/3 cup brown sugar, 2 eggs, 1 tsp vanilla extract, 1/2 cup milk, 2 tbsp sour cream
• Add in the flour, baking soda, and salt and gently fold using a spatula. Stop mixing when the flour disappears and pour it in the prepared loaf pan.
  1 & 3/4 cup AP flour, 1 tsp baking soda, 1/2 tsp salt
• Bake the brown butter banana loaf cake in the preheated oven for 60-65 minutes (read the notes). You will know your banana bread is ready when it is golden caramel colored on top and a wooden skewer inserted in the center or it comes out clean.
• Allow the loaf cake to cool down in the pan for 10-15 minutes before transferring it to a cooling rack to cool down for a few more minutes before serving.