Preheat the oven to 350°F and spray your 8x4 loaf pan with cooking spray or grease it with butter.
Melt the butter in a bowl. You can melt it in the microwave or on the stove.
Add bananas to the same bowl, and mash with a fork.
Add vanilla extract and eggs to the same bowl, and mix everything very well.
In a second bowl, whisk together flour, sugar, baking soda, cinnamon, and salt.
Add the dry ingredients to the wet mixture, and combine everything together using a spatula.
Pour the batter into the prepared loaf pan and bake for 45 minutes. To check if it's ready, insert a toothpick; if it comes out clean, it's done. Let it cool completely, and it's ready to indulge. Enjoy!
