Apple Cinnamon Walnut Loaf

Name: Apple Cinnamon Walnut Loaf
Cuisine: American
Ingredients: 1/4 cup unsalted butter, softened; 3/4 cup brown sugar, packed; 1 egg; 1/2 tsp vanilla extract; 1 1/2 all purpose or whole wheat flour; 1 1/4 tsp baking soda; 1/2 tsp baking powder; 1/2 tsp salt; 2 tsp cinnamon; 1/2 cup + 2 tbsp buttermilk; 1 cup diced apple; 1/2 cup chopped California Walnuts