Baking Cinnamon Roll Banana Bread is a straightforward process that follows these easy steps:

1. Preheat Oven: Begin by preheating your oven to 350°F (175°C). Grease a standard 9×5-inch loaf pan.
2. Prepare Bananas: In a mixing bowl, mash the ripe bananas until smooth, leaving some small chunks for texture if desired.
3. Mix Wet Ingredients: Pour in the melted butter, and mix until well combined. Add the baking soda and salt; mix again until smooth.
4. Add Sugar and Egg: Stir in the granulated sugar, beaten egg, and vanilla extract until thoroughly mixed.
5. Incorporate Flour: Gradually add the flour to the mixture, stirring until just combined. Be careful not to overmix; it’s okay if a few lumps remain.
6. Prepare Cinnamon Filling: In a small bowl, combine the brown sugar and ground cinnamon for the filling.
7. Layer the Mixture: Pour half of the banana batter into the prepared loaf pan. Sprinkle half of the cinnamon mixture over the batter.
8. Add Remaining Batter: Pour the remaining banana batter on top. Sprinkle the rest of the cinnamon mixture atop the batter.
9. Swirl the Mixture: Using a knife or skewer, gently swirl the batter to create a marble effect. Avoid over-mixing, as you want distinct layers.
10. Bake: Place the loaf pan in the preheated oven and bake for 50-60 minutes, or until a toothpick inserted in the center comes out clean.
11. Cool: Once baked, remove the loaf from the oven and let it cool in the pan for about 10-15 minutes before transferring to a wire rack to cool completely.

By following these steps, you will create an irresistible Cinnamon Roll Banana Bread that is sure to please everyone!