Preheat oven to 350 degrees F and spray a loaf pan with cooking spray.
Add the bananas to a large bowl and mash them using fork tines. Add the eggs, brown sugar and flour and stir to combine.
Pour the mixture into the prepared loaf pan. Bake in the preheated oven for 45-50 minutes, or until a toothpick inserted into the center comes out clean.
Let cool for 10 minutes before cutting into thick slices and serving!