Preheat the Oven: Set your oven to 350°F (175°C). Grease your loaf pan, mini loaf pans, muffin tin, or line with parchment paper or muffin liners.
Mash the Bananas: In a large mixing bowl, mash the bananas until smooth.
Mix Wet Ingredients: Add the melted butter, sugar, eggs, and vanilla extract to the mashed bananas. Whisk until well combined.
Combine Dry Ingredients: Whisk together the flour, baking soda, salt, and cinnamon in a separate bowl.
Mix Wet and Dry Ingredients: Gradually add the dry ingredients to the banana mixture, stirring until combined. Avoid overmixing.
Additions (Optional): Fold in the walnuts or chocolate chips if using.
Bake:For a full loaf: Pour the batter into the greased loaf pan. Bake for 50-60 minutes.For mini loaves: Divide the batter evenly between mini loaf pans, filling each about ¾ full. Bake for 25-30 minutes.For easy banana muffins: Spoon the batter into the muffin tins, filling each cup about ¾ full. Bake for 18-22 minutes. To check for doneness, complete the toothpick test. Insert a toothpick into the center of the loaf or muffin. If it comes out clean or with just a few crumbs, it’s ready. If the toothpick comes out wet, bake for 5 minutes and test again.
Cool and Serve: Let the banana bread or muffins cool in the pan for 10 minutes before transferring to a wire rack. Allow to cool completely before slicing or serving.