Whole Wheat Banana Nut Bread

preheat oven to 350

1/2 cup Butter
1 cup sugar
2 eggs
1 cup mashed ripe bananas
1 cup flour
1 cup whole wheat flour.
1 tsp baking powder
1/2 tsp baking soda
1/2 tsp salt
1/2 cup walnuts

Cream butter and sugar until well blended. Beat in eggs and mashed banana. In a small bowl combine flours, baking soda, baking powder and salt and blend into creamed mixture. Stir in nuts and pour into prepared loaf pans, bake for one hour and ten minutes or until tested done.