Preheat your oven to 350°F. Grease a 9x5 inch loaf pan and line the bottom and sides with parchment paper.

In a small bowl, whisk together the flour, baking soda, and salt. Set aside.

In a large bowl, combine the melted butter, vegetable oil, sugar, eggs, and vanilla extract. Whisk to combine.

Mix in the mashed bananas until well combined.

Add the dry ingredients and chocolate chips to the wet ingredients. Mix until just combined, taking care not to overmix.

Pour the batter into the prepared loaf pan. Bake in the center of your preheated oven for 50 to 60 minutes, or until a skewer inserted into the center comes out with a few moist crumbs.

Cool the bread in the loaf pan until slightly warm or at room temperature before slicing and serving.