Preheat oven to 350 degrees F. Grease a 9x5 loaf pan with nonstick baking spray. Line the inside of the loaf pan with parchment paper and leave a parchment paper overhang over two sides to use as a handle.

In a large bowl, add in the melted butter, sugar, milk, vanilla extract, whole egg and an additional egg yolk, and mashed bananas. Whisk until incorporated.

In a small bowl, add in the flour, baking soda, and salt. Stir until combined.

Add the dry ingredients into the bowl of wet ingredients. Beat using a hand mixer on medium speed until the flour is incorporated. Scrape down the sides of the bowl and mix in any remaining bits.

In a medium bowl, add in the cream cheese. Mix using a hand mixer on medium speed until smooth.

Add in the sugar and flour. Continue to mix until incorporated.

Add in the egg and beat until incorporated.

Pour half of the banana bread batter into the prepared pan. Spread it out evenly into the bottom of the pan.

Spoon the cream cheese filling on top of the banana bread batter making sure to evenly distribute it.

Pour the remaining banana bread batter on top of the cream cheese filling and spread it out evenly.

Sprinkle the top of the banana bread with chopped walnuts.

Place in the preheated oven and bake for 50-60 minutes or until a toothpick that’s inserted into the center of the banana bread comes out clean.

Allow the banana bread to cool for 10 minutes before pulling it out of the pan by the parchment paper handles to cool completely on a wire rack.

Once cooled, store in an airtight container in the refrigerator.