Preheat the oven to 350°F. Butter and flour a 9x5 loaf pan.
In a large bowl, combine the olive oil, granulated sugar, bananas, and eggs.
Add the vanilla extract, baking soda, and salt, and combine.
Add the flour, and using a spoon, mix to combine.
Pour the batter into the prepared loaf pan and bake for 50 minutes to 1 hour or until a toothpick inserted in the middle comes out clean.
Notes
Fully Preheat the Oven: Many ovens will say they are preheated when they actually aren't. Ovens often need an extra 15 minutes to come up to the full temperature.
Measuring Bananas: If you want to be precise, add the bananas to a 4-cup glass measuring pitcher and use a hand held beater to mash them. Scrape down the sides of the pitcher with a spoon and check to ensure that you have 2 cups of mashed bananas.
Don't Overmix: Overmixing the flour develops gluten, which is great for pizza crust but not for a soft and tender banana bread.
Loaf Pan Type: In this recipe, I use a ceramic loaf pan. If you are using a metal loaf pan, you may need to reduce the baking time by 5 minutes. If you are using a glass loaf pan, you may need to add 5 minutes.