Tonkotsu ramen is a rich and creamy pork-based soup that originated in Fukuoka, Japan. The broth is made by simmering pork bones for hours until the collagen and marrow break down, creating a thick and flavorful soup. The noodles are typically thin and straight, and the toppings can include sliced pork belly, green onions, bamboo shoots, and a soft-boiled egg. To make the broth even richer, some recipes call for adding a dollop of miso paste or a spoonful of butter.
