Start by placing the butter in a small saucepan over medium heat. Stir it occasionally as it melts and begins to turn a deep golden color with small brown specks. Once it reaches this stage, remove it from the heat and let it cool slightly.
This step gives the cake a rich nutty flavor that regular melted butter cannot provide. After browning, place the butter in the freezer for about five minutes so it cools quickly before using it in the batter.
Preheat your oven to 350°F (175°C) while preparing the batter. Grease a cake pan lightly with butter and coat it with a little sugar to prevent sticking.
Preparing the pan properly helps the cake release easily after baking. It also gives the edges a light sweetness and slightly crisp texture.
In a mixing bowl, mash the ripe bananas thoroughly until no large chunks remain. Smooth mashed bananas help distribute the flavor evenly throughout the cake.
The riper the bananas are, the sweeter and softer the cake will be. Overripe bananas with brown spots are actually perfect for baking.
Add the brown butter, brown sugar, egg, vanilla extract, and sour cream to the mashed bananas. Whisk everything together until the mixture becomes smooth and well combined.
These ingredients create a rich and creamy batter base. The sour cream in particular helps keep the cake soft and moist even after baking.
Now add flour, baking powder, salt, and cinnamon to the bowl. Gently mix everything together until just combined and only a few flour streaks remain.
Avoid overmixing at this stage because it can make the cake dense. Finally, fold in the chopped pecans for extra flavor and texture.
Pour the batter into the prepared cake pan and smooth the top. Place the pan in the oven and bake for about 35–40 minutes.
Check the cake by inserting a toothpick in the center. If it comes out clean, the cake is ready. Let it cool completely before adding the frosting.
In a mixing bowl, beat the cream cheese and brown butter until the mixture becomes light and fluffy. Gradually add powdered sugar and continue mixing until smooth.
Finally, mix in the salted caramel sauce and beat for another minute. Once the cake has cooled, spread the frosting evenly on top and drizzle extra caramel for decoration.