Preheat the oven to 350°F (180°C).
Peel and thaw frozen bananas in a microwave. Reserve all the juices and everything.
Prepare two 9×5-inch bread pan and spray with non-stick cooking spray.
In a large bowl, mash the thawed bananas with a fork or potato masher until mostly smooth.
Add sugar, melted butter, eggs and vanilla extract. Using a wooden spoon, mix everything until combined.
Then add flour, baking soda, baking powder and salt. Mix to combine.
Optional, add chopped pecans and/or other add-ins, like chocolate chips, dried fruits.
Divide the batter evenly into the prepared pans.
Bake for 60 minutes, or until the inserted toothpick comes out clean. Cool completely before serving.
Keep the banana bread in the bread pan, covered tightly, in the fridge for up to 3 days.