Banana Maple Walnut Bread with Maple Walnut Butter

Name: Banana Maple Walnut Bread with Maple Walnut Butter
Ingredients: For the Maple Walnut Butter; 1/2 cup walnuts, toasted in 350F oven for 8 to 10 minutes; 1 teaspoon walnut oil; 4 tablespoons butter; 1/4 cup pure maple syrup (I used Grade B from Michigan); For the Bread; 1/2 cup granulated sugar; 1/4 cup pure maple syrup; 1 egg; 1 tablespoon walnut oil; 2 very,very ripe bananas, smashed with a fork; 3 tablespoons sour milk (mix 1 teaspoon white vinegar into 1/4 cup milk and then measure your 3 tablespoons); 2 cups all purpose flour; 1/4 teaspoon salt; 1/4 teaspoon baking soda; 1/2 teaspoon baking powder; 1 cup walnuts toasted in a 350F oven for 8 to 10 minutes