1-1/2 cups sugar
1/2 cup butter
2 large eggs, lightly beaten
2-1/4 cups flour
1/2 teaspoon baking powder
3/4 teaspoon baking soda
1/2 teaspoon salt
1-1/4 cups mashed banana
1 teaspoon vanilla extract
1/4 cup buttermilk
1 cup chopped walnuts
1 cup semisweet chocolate chips
Preheat oven to 350 degrees F. Spray a large loaf pan with nonstick cooking spray. Beat sugar and butter at medium speed with an electric mixer until well blended. Add eggs one at a time, beating well. Combine flour and next three ingredients in a separate bowl. Add to butter mixture, beating well. Combine banana and next four ingredients. Add to flour mixture, beating well. Pour batter into loaf pan and smooth out top.
Bake 1 hour and 15 minutes or until tester comes out clean.