
In a bowl, mix in flour, sugar, baking soda, salt, cinnamon and walnuts. In another bowl combine eggs, sour cream, vanilla and melted butter. Mix together. Add mashed bananas. Give a good stir. Slowly add dry ingredients to the liquid mixture. Do not over mix. Mix just enough to mix together. Fold in blueberries. Pour batter into a greased loaf pan and bake in a 350 F pre-heated oven for 50 - 60 minutes. Remove allow to cool.