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Japanese Tonkotsu Ramen (Pork Bone Broth Noodles)

Tonkotsu Ramen
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Tonkotsu Ramen, known for its rich, creamy broth made by simmering pork bones for hours, this ramen is a hearty and deeply satisfying experience.

Whether you’re slurping it in a bustling ramen shop or savouring it at home, Tonkotsu Ramen offers a complex, umami filled bite that represents both tradition and innovation in Japanese cuisine.

What Is Tonkotsu Ramen?

Tonkotsu Ramen is a popular Japanese noodle dish distinguished by its milky, pork based broth. The word “tonkotsu” refers to the pork bones, which are simmered over long hours, often up to 12 or more, to release their collagen, marrow, and fat, creating a broth that is thick, creamy, and deeply flavourful.

The noodles are typically thin and firm, designed to complement the richness of the broth without becoming too heavy.

Toppings are an essential part of the Tonkotsu Ramen experience. A slice of tender, slow cooked pork belly (chashu) is often laid on top, alongside a marinated soft-boiled egg (ajitsuke tamago), spring onions, and sometimes wood ear mushrooms or seaweed.

The combination of the creamy broth, the chewy noodles, and the savoury toppings creates a meal that is both luxurious and comforting.

Ingredients and Taste

The star of Tonkotsu Ramen is, without a doubt, the broth. Made from pork bones, typically neck and leg bones, it is boiled for hours until it turns opaque and creamy, releasing the natural richness of the marrow and collagen.

This process creates a depth of flavour that is both intensely savoury and slightly sweet, with a silky texture that coats the noodles and lingers on the palate.

The noodles are typically straight and thin, with a firm bite that balances the heavy broth. Their texture is key to the overall experience, too soft, and they would get lost in the richness of the soup; too firm, and they would overpower the delicate balance of flavours.

Toppings like chashu (braised pork belly) add a tender, melt-in-your-mouth richness, while the marinated egg brings a savoury, creamy contrast. Garnishes like spring onions and pickled ginger offer a bright counterpoint, cutting through the heaviness and refreshing the palate with each bite.

The overall taste of Tonkotsu Ramen is a perfect harmony of intense umami, balanced fat, and subtle sweetness. The broth is thick enough to be satisfying but not overwhelming, allowing each component to stand out while still contributing to a cohesive, flavourful experience.

A Taste of History

Tonkotsu Ramen originated in the southern Japanese island of Kyushu, particularly in the Fukuoka region. Its development is tied to the local food culture, where pork has been a staple ingredient.

In the early 20th century, ramen began gaining popularity in Japan, but Tonkotsu Ramen as we know it today really started to take shape in the post-World War II era, when street vendors in Fukuoka began simmering pork bones for extended periods to create a heartier, more affordable meal.

The dish became a hit, especially among workers who needed something filling and energizing. Over time, Tonkotsu Ramen spread beyond Kyushu, becoming a beloved dish across Japan and eventually the world.

Its rich, creamy broth set it apart from other regional styles of ramen, which often relied on soy sauce or miso based broths.

Tonkotsu Ramen (Pork Bone Broth Noodles) Recipe

Serves: 4 people

Ingredients:

  • 2 pounds pork bones (preferably femur or knuckle bones)
  • 1 pound pork belly or pork shoulder
  • 1 large onion, halved
  • 1 head garlic, halved crosswise
  • 1-inch ginger, sliced
  • 4 green onions, chopped (whites and greens separated)
  • 1/4 cup soy sauce
  • 2 tbsp sake
  • 1 tbsp mirin
  • 1 tbsp miso paste (optional)
  • 4 soft-boiled eggs
  • 4 servings fresh ramen noodles
  • Toppings: sliced nori, bamboo shoots, sesame seeds, and chili oil

    Directions

    Step 1

    To begin, thoroughly rinse the pork bones under cold water to remove any impurities. Place the bones in a large pot and cover with water. Bring to a boil over high heat, and let boil for 10 minutes. Drain the water, and rinse the bones again to clean them well. This step is crucial to ensure a clean, flavourful broth.

    Step 2

    In the same pot, return the cleaned pork bones and add enough water to cover them completely. Add the halved onion, garlic, ginger, and the white parts of the green onions. Bring the pot to a boil, then reduce to a simmer. Cover and cook for 6-8 hours, adding water as necessary to keep the bones submerged. The longer the simmer, the richer the broth.

    Step 3

    While the broth is simmering, preheat your oven to 300°F (150°C). Season the pork belly or shoulder with salt and pepper. Sear the meat in a hot pan until browned, then transfer to an oven-safe dish. Bake for 2 hours, or until tender. Once done, allow the meat to cool slightly, then slice thinly for topping the ramen.

    Step 4

    After simmering the broth, strain the liquid through a fine mesh sieve into a clean pot, discarding the bones and vegetables. Add soy sauce, sake, mirin, and miso paste (if using) to the broth. Stir and adjust seasoning to taste. The broth should have a deep, umami rich flavour.

    Step 5

    In a small pot, boil the ramen noodles according to package instructions. Drain and set aside.

    Step 6

    Prepare the soft-boiled eggs by placing them in boiling water for 6 minutes, then transferring them to an ice bath. Once cool, peel the eggs and slice in half.

    Step 7

    To assemble the ramen, divide the noodles into four bowls. Pour the rich pork broth over the noodles. Top each bowl with slices of pork belly, soft-boiled egg halves, nori, bamboo shoots, green onions, and a sprinkle of sesame seeds.

    Step 8

    For serving, drizzle a bit of chili oil over each bowl for an added kick. Present the ramen with extra toppings on the side, such as chili flakes or pickled ginger, to enhance the flavors. Enjoy your hearty, authentic Tonkotsu Ramen!

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