2Grease and line a 9x5-inch loaf pan with parchment paper.
3In a large bowl, add bananas and mash until smooth, leaving a few chunks.
4Add melted butter, granulated sugar, brown sugar, eggs and mix until smooth.
5Add sour cream, vanilla extract, and mix until well combined.
6In a separate bowl, whisk flour, baking soda, and salt.
7Fold dry ingredients into wet just until combined (do not overmix).
8Gently fold in chocolate chips.
9Pour batter into prepared pan.
10Optional: sprinkle extra chocolate chips on top.
11Bake at 425°F (220°C) for 10 minutes.
12Reduce temperature to 350°F (175°C) and continue baking for 50-60 minutes or until a toothpick inserted in the center comes out with a few moist crumbs.
13Lightly tent with foil partway through to prevent over-browning.