• Preheat oven to 350 degrees.
• Prep a 9 X 5 inch loaf pan with nonstick baking spray.
• Add the butter, both sugars, egg, sour cream, and vanilla to a mixing bowl.
• Use an electric mixer whisk attachment to cream the ingredients together.
• With a fork, mash the bananas. Add the mashed bananas to the mixing bowl.
• Whisk together the flour, baking powder, baking soda, and salt in a separate bowl.
• Add the dry ingredients to the mixing bowl. Beat to blend all of the ingredients together.

Filling:

• Use an electric mixer whisk attachment to combine the cream cheese, egg, sugar, and flour together.

Making the bread:

• Scoop one half of the bread batter in the loaf pan. Evenly spread the layer of the batter.
• Spoon the cream cheese filling over the bottom layer of the unbaked banana bread batter.
• Pour the remaining banana batter over the cream cheese filling.
• Even the top of the batter with an offset spatula. Bake at 350 degrees for 50 minutes.
• Insert a toothpick in the center of the loaf to make sure the bread is done.
• Remove from the oven and allow it to cool in the pan for 5 minutes.
• Enjoy!