For the cake. Preheat your oven to 350 degrees. Prepare a 9x13 inch pan with cooking spray. Set aside. In a large bowl combine flour, sugar, cinnamon, salt, baking powder and baking soda. Gradually add oil, eggs, bananas and pineapple. Once incorporated bake for 50-60 minutes or until a toothpick inserted into the center comes out clean. This cake is fabulous on its own but if you want to include frosting prepare it while the cake cools.