Preheat Oven: Preheat your oven to 350°F. Grease a 9x5 inch loaf pan and set aside.
Prepare the Wet Ingredients: In a large mixing bowl, cream together ½ cup of unsalted butter and 1 cup of packed brown sugar until light and fluffy, about 2-3 minutes. Add 1 large egg to the butter and sugar mixture, beating well to incorporate. Mix in 3 mashed ripe bananas and 1 teaspoon of vanilla extract until well combined.
Sift Together Dry Ingredients: In a separate bowl, sift together 2 cups of all-purpose flour, 1 teaspoon of baking powder, ½ teaspoon of baking soda, and ¼ teaspoon of salt.
Combine Wet and Dry Ingredients: Gradually add the sifted dry ingredients to the banana mixture, stirring just until combined. Avoid overmixing as it can make the bread tough.
Add Chocolate Chips and Walnuts: Fold in 1 cup of semi-sweet chocolate chips and 1 cup of chopped walnuts until evenly distributed throughout the batter.
Pour into Pan: Pour the batter into the prepared loaf pan and smooth the top with a spatula. Add a few chocolate chips and walnuts on top for presentation.
Bake: Bake in the preheated oven for about 60-65 minutes, or until a toothpick inserted into the center of the bread comes out clean. If the top is browning too quickly, you can cover it with aluminum foil around the 40-minute mark.
Cool: Once done, remove the bread from the oven and let it cool in the pan for about 10-15 minutes. After 10-15 minutes, transfer the bread to a wire rack to cool completely.
Slice and Serve: Once cooled, slice the chocolate chip banana bread into desired thickness and serve. It can be enjoyed on its own, or with a spread of butter or a drizzle of honey!
Notes:
Store the banana bread in an airtight container at room temperature for up to 3 days, or refrigerate it to extend its shelf life.
You can also wrap it in plastic wrap and freeze it for up to 3 months. To serve, thaw it at room temperature.