Preheat oven to 350 degrees Fahrenheit.
Peel ripe bananas and put them in a large mixing bowl, then mash them until creamy.
4 small very ripe bananas
Add melted butter and granulated sugar to a new bowl; whisk together. Add eggs and vanilla to the same bowl, and whisk all ingredients together.
1/2 cup melted unsalted butter, 1 cup granulated sugar, 2 large eggs, 2 teaspoons vanilla extract
Add salt, sour cream, mashed bananas, baking soda, and combine ingredients.
1/3 cup sour cream, 1 teaspoon kosher salt, 1 teaspoon baking soda
Sift in the flour and cocoa powder. Add to the batter and beat just until it comes together. Do not over mix.
1 cup all-purpose flour, 1/2 cup unsweetened cocoa powder
Fold in the chocolate chips.
1/2 cup mini chocolate chips
Pour batter into a 9x5 loaf pan and top with more extra chocolate chips, optional.
Bake for 55-60 minutes or until a toothpick comes out clean. Let cool in pan for 10 minutes and transfer to a cooling rack.