Miso soup cubes, also known as tofu, are a type of food made from soybeans. They are commonly used in Japanese cuisine and are often added to miso soup. The cubes are made by pressing cooked soybeans into a block and then cutting them into cubes. They have a soft texture and a mild flavor that can be enhanced with the addition of other ingredients. Miso soup cubes are a great source of protein and are low in fat and calories.