Creating delicious Banana Bread Bars is a breeze if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a 9×13 inch baking pan.
2. Mash the Bananas: In a large mixing bowl, mash the ripe bananas until smooth.
3. Mix in Butter: Add the melted butter to the mashed bananas and mix well.
4. Incorporate Sugar and Eggs: Stir in the granulated sugar, eggs, and vanilla extract until well combined.
5. Add Dry Ingredients: Sprinkle the baking soda and salt over the mixture. Gently fold in the flour until just combined.
6. Incorporate Optional Ingredients: If using, fold in the chopped walnuts and chocolate chips for added texture and flavor.
7. Pour Batter: Pour the batter into the prepared baking pan, smoothing the top with a spatula.
8. Bake: Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted in the center comes out clean.
9. Cool: Remove from the oven and let the bars cool in the pan for about 10-15 minutes before transferring them to a wire rack.
10. Slice and Serve: Once completely cooled, slice into bars and serve.