Step 1

Preheat oven to 350 degrees F (175 degrees C). Grease a 9x5 inch loaf pan.

Step 2

In a large bowl, mix together the butter and sugar. Add the eggs, vanilla and lemon juice. Mix well. In a separate bowl, combine the flour, baking soda, baking powder and salt. Once fully combined, pour into the butter mixture. Mix until smooth.

Step 3

Mash the bananas with a fork or a potato masher. Fold in the sour cream, walnuts and mashed bananas. Spread the mixture evenly into the greased 9x5 inch loaf pan.

Step 4

Bake at 350 degrees F (175 degrees C) for 60 minutes (or until a toothpick comes out clean from the center of the loaf).

Step 5

Remove from oven and allow the bread to cool in the pan for 10 minutes. Then remove and place on a wire rack to cool completely.