This chocolate zucchini loaf or cake was delicious, especially considering it's made with 100% whole wheat flour. It came out fluffy and moist, packed with chocolate flavor. The best part was that there were some melted chocolate chips and walnuts in every single bite. I used reduced-fat sour cream instead of sour milk, I used half butter and half applesauce instead of margarine, reduced the sugar a bit, and used olive oil to replace canola oil. I halved the recipe, baked in mini loaf pan, and got 8 beautiful mini loaves. Not too sweet, but packed with yumminess and goodness. Great for breakfast or snack.