This bread is bananas! Healthy-ish Banana walnut bread

There is nothing I love more then a satisfying slice of banana bread especially if I know the bread has been made with passion love and whole wheat flower. So many things that should be healthy are actually just a pile of crap. Mediocre ingredients, bleached processed flour, sugar antibiotic filled butter you name it. Of course there are a lot of bakeries and shops that put a premium on their products and use the best but until I know for sure i'll stick to my own cooking. Here's my recipe for a delicious moist sweet treat. 
This bread is bananas INGREDIENTS: 
4 over ripe bananas - mashed TIP: keep them in the freezer until ready to use
1 2/3 cups whole wheat flour
1tsp baking soda 
1/4 tsp cardamom 
1/2 tsp fine salt
3/4 cup unbleached cane sugar
2 eggs
1/2 cup oil - canola or other preferred 
3 tbs sour cream 
1 tsp vanilla
1tsp almond extract 
2/3 cup chopped walnuts 
PRE HEAT: oven 350
PREP: In two separate bowls: Sift all dry ingredients together. And add eggs sugar and extracts until light - sugar has mostly dissolved. Add oil sour cream and mashed bananas into mixture. Add chopped walnuts into flour and slowly add the dry to the wet ingredients. Grease loaf pan with butter or use non stick, then pour in batter. 
BAKE: at 350 for 45 minutes to an hour. Test with long skewer.  
GARNISH: For a nicer presentation dust the top of bread with powdered sugar.