– 1 ½ C of mashed ripe bananas (about 3 medium bananas)– ¼ C of granulated sugar– ⅓ C of canola or vegetable oil, plus more for greasing– 1 tsp of baking powder– 1 tsp of baking soda– ½ tsp of salt– 1 ½ C of whole wheat or all-purpose flour– 1 C of fresh or frozen blueberries