Miso ramen is a popular variation of ramen that features a broth made with miso paste, which is a fermented soybean paste. The broth is typically lighter and less fatty than tonkotsu ramen, and has a slightly sweet and savory flavor. The noodles are usually curly and thick, and the toppings can include sliced pork, bean sprouts, corn, and green onions. Some recipes also call for adding a spoonful of butter or a drizzle of sesame oil to enhance the flavor.