This banana bread is moist and absolutely delicious! It's good anytime, enjoy it for breakfast, snack time, with coffee or for dessert. It is a great way to use up dark, overripe bananas, and takes just 10 minutes to prepare.
Preheat the oven to 350 degrees. In a medium size bowl combine the butter and sugar. Cream together with an electric mixer until light and fluffy. Add in the mashed banana and egg, stir just until blended in.
In another medium sized bowl, stir the rest of the dry ingredients together (flour, baking powder, baking soda and salt).
Mix 1/2 of the dry ingredients into the wet ingredients. Stirring just until the flour is blended in. Add 1/2 cup of the chopped walnuts and the remainder of the flour mixture, stir together until blended. Do not over mix.
Pour the batter into a greased and floured 8x4 inch loaf pan. Sprinkle the top with the remaining 1/2 cup of chopped walnuts.
Bake at 350 degrees for 55-60 minutes or until a toothpick inserted near the center comes out clean. Cool on a rack for 10 minutes, then remove from the pan. Let cool completely before eating.