Using olive oil to make sweets may seem counterintuitive, but it doesn’t just belong in salads and savories, it makes great cakes too. Good news for those who either don’t tolerate dairy well or... who are simply trying to cut down on saturated fats. This dense, moist cake is intensely banana-y. For the best results use really ripe bananas. Their sugars will add to the cake’s overall sweetness, not to mention its delicious taste.