To make the bananas sweeter and softer, try roasting them in the oven. First, preheat the oven to 300 degrees F and place aluminum foil or parchment paper on a baking sheet. Then, take two bananas and slice them in half lengthwise without removing the peels. Sprinkle the insides of the bananas with a little bit of sugar and place them face down on the baking sheet. Bake for six to nine minutes until the skins are black. After they cool, the skins will slip right off, and the bananas will be soft and gooey. This way the banana flavor in recipes will be more prominent.