Blueberry Upside-down Cake Tweet Pin It A Blueberry Upside-down Cake for when you have an abundance of blueberries. A thick layer of blueberries, fresh or frozen work equally well, shine against a lovely vanilla cinnamon cake. Other Cake Recipes You Might Like Plum Upside-Down CakeFig and Raspberry Upside-Down CakeNectarine and Blueberry Cake Continue Reading