This easy Cinnamon Streusel Zucchini Banana Bread is a mash up of the classic favorites banana bread and zucchini bread! Topping it off is a rich, buttery cinnamon streusel! Put those overripe bananas and abundant zucchini to good use! We're firmly in the middle of zucchini season around here. We've been grilling it, making zoodles,