The BEST Cinnamon Swirled Banana Bread. This Cinnamon Swirled Banana Bread is full of buttery cinnamon sugar throughout the moistest banana bread that’s out-of-this world delicious! Swirls of buttery cinnamon sugar swim throughout the moistest banana bread with the most amazingly sweet crust that’s out of this world delicious! It’s like a cinnamon roll crashed into a loaf of banana bread and it turned into one of my tastiest banana bread recipes ever!