Banana Chocolate Chip Walnut Bread

My brother devours this banana bread whenever it is within his grasp. In fact, I usually make two loaves at once because I know that it will disappear quickly! (Doubling the recipe is fine, but make sure to keep the mixes separate so that you have equal parts batter and walnut-chocolate chip filling.) Bread can be served as dessert a la mode (place it back in the oven once dinner is ending, then serve with a scoop of vanilla or chocolate ice cream on top) or as a delicious breakfast treat (toast in the toaster oven, and slather with rasperry jam)!

Ingredients
1 1/2 cups all purpose flour
1 teaspoon baking soda
1 teaspoon baking powder
1/4 teaspoon salt
3/4 cup semisweet chocolate chips
3/4 cup walnuts, toasted, chopped
1/2 cup (1 stick) unsalted butter, room temperature
1 cup sugar
2 large eggs
1 cup mashed ripe bananas
2 tablespoons fresh lemon juice (optional)
1 1/2 teaspoons vanilla extract

Directions
1. Preheat oven to 350°F.
2. Butter and flour 9x5x2 1/2-inch metal loaf pan.
3. Whisk first 4 ingredients in medium bowl to blend.
4. Combine chocolate chips and walnuts in small bowl; add 1 tablespoon flour mixture and toss to coat.
5. Beat butter in large bowl until fluffy. Gradually add sugar, beating until well blended. Beat in eggs 1 at a time. Beat in mashed bananas, lemon juice and vanilla extract. Beat in flour mixture. 6. Spoon 1/3 of batter into prepared pan. Sprinkle with half of nut mixture. Spoon 1/3 of batter over. Sprinkle with remaining nut mixture. Cover with remaining batter. Run knife through batter in zigzag pattern.
7. Bake bread until tester inserted into center comes out clean, about 1 hour 5 minutes. Turn out onto rack and cool.