Preheat your oven to 350°F (175°C).
In a mixing bowl, combine the mashed bananas with the melted butter.
Add in the eggs and mix well.
Stir in the brown sugar, Greek yogurt, buttermilk, and vanilla extract until the mixture is smooth.
In a separate bowl, whisk together the flour, baking soda, and salt.
Gradually fold the dry ingredients into the wet ingredients until just combined.
Add the chocolate chips and gently mix them into the batter.
Pour the batter into a bread pan. If you want smaller loaves, you can split the batter into two pans.
Bake in the preheated oven for about 25 to 30 minutes if baking two smaller loaves, or about 45 minutes if using all the batter in one pan.
Check for doneness by inserting a toothpick in the center; it should come out clean.
Allow the bread to cool before slicing and serving.