*You can use all pecans or all chocolate if you prefer, just make sure the total amount stays about the same.
Preheat your oven to 350°F. Line a 9X5inch metal baking pan with parchment paper, making sure it goes up and over the long sides.
Toss the pecans and chocolate chips with one tablespoon of flour until evenly coated, set aside.
In a large mixing bowl, mash the very overripe bananas until smooth.
Add the vegetable oil, vanilla extract, melted and cooled butter, granulated sugar, dark brown sugar, sour cream, and eggs to the mashed bananas. Mix until well combined.
In a separate bowl, whisk together the all-purpose flour, baking soda, kosher salt, and cinnamon until evenly mixed.
Gradually add the dry ingredients to the wet mixture, whisking gently until just combined. Be careful not to over mix.
Stir in the coated pecans and chocolate chips until combined.
Pour the batter into the prepared 9x5-inch metal baking pan, smoothing the top with a spatula. Top with a few chopped pecans if desired.
Position it on the center rack of the oven to ensure even baking, avoiding placement too close to the top or bottom. Bake in the preheated oven for 55-60 minutes, or until a toothpick inserted into the center comes out clean.
Allow the banana bread to cool in the pan for about 10 minutes, then transfer it to a wire rack to cool completely.