This is the ultimate chocolate cake recipe that requires only two ingredients: bananas and a bar of chocolate, and can be made without an oven. Simply tear room-temperature bananas into small pieces, blend them with melted chocolate, pour the mixture into a container, and chill in the refrigerator for at least 4 hours until firm. Although it contains no added sugar, the natural sweetness of the bananas and the richness of the chocolate blend perfectly, resulting in a smooth, melt-in-your-mouth texture. It's easy to make, making it perfect for baking beginners and those short on time.