Preheat the oven to 350°F. Line a 9-inch loaf pan with parchment paper leaving an overhang on the two longer sides. Grease the parchment paper with cooking spray.
In a large bowl, whisk together the flour, brown sugar, white sugar, baking powder and salt. Set the mixture aside.
In a separate small bowl, whisk together the mashed bananas, eggs, olive oil and vanilla extract.
Add the wet ingredients to the dry and mix just until combined.
Fold in the chocolate chips or chopped nuts then transfer the batter to the prepared baking pan.
Bake the banana bread for 45 minutes then tent it loosely with foil and continue baking it an additional 10 to 15 minutes until a toothpick inserted comes out clean.
Remove the banana bread from the oven and set it aside to cool completely. Slice and serve.
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