Preheat the oven to 350 degrees Fahrenheit.
Peel the ripe bananas and mash them in a large mixing bowl until creamy.
In a new bowl, whisk together melted butter and granulated sugar. Add eggs and vanilla to the same bowl, whisking all ingredients together.
Add salt, sour cream, mashed bananas, and baking soda; combine the ingredients.
Sift in the flour and cocoa powder, then add to the batter. Beat just until it comes together; avoid overmixing.
Fold in the chocolate chips.
Pour the batter into a 9×5 loaf pan and optionally top with more chocolate chips.
Bake for 55-60 minutes or until a toothpick comes out clean. Let it cool in the pan for 10 minutes before transferring to a cooling rack. Enjoy your delightful Chocolatey Banana Bread!