Versatile Buttermilk Bread - Banana or Zucchini

I got this recipe from my sister-in-law while I was searching for a moist banana bread recipe years ago. She said the buttermilk makes all the difference. After trying a handful of different recipes - I am inclined to agree! The original recipe is for banana bread. I loved it so much I also altered it to make zucchini bread too! This recipe is one of those throw everything in a bowl and mix recipes - which is why I love it. It also freezes very well. **If you don't have buttermilk - plain yogurt can easily be substituted. Use 1/2 cup yogurt with a splash of milk.