Japanese Tonkotsu Ramen
Homemade Chashu

By DishFrames
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Transform a simple packet of instant noodles into a gourmet experience. This clever recipe pairs a creamy tonkotsu base with melt-in-your-mouth, slow-braised pork belly chashu.

↓ The ingredients ↓ The steps

While a traditional tonkotsu broth takes days to simmer, this approachable method focuses your effort on crafting an authentic, tender pork belly chashu. By elevating a high-quality instant ramen base with homemade aromatics, deeply savory braised pork, and a soy-steeped egg, you can enjoy a restaurant-quality bowl of comfort at home.

A steaming bowl of creamy tonkotsu ramen topped with homemade chashu, sweet corn, a soft-boiled egg, and fresh scallions.
A steaming bowl of creamy tonkotsu ramen topped with homemade chashu, sweet corn, a soft-boiled egg, and fresh scallions.
Prep20 mins
Cook2 hr 10 mins
Total2 hr 30 mins
Yield1 serving
DifficultyMedium
Calories850 kcal

Ingredients

Instructions

  1. 1Roll the pork belly
    Hands tightly rolling a raw piece of pork belly into a uniform cylinder on a pink cutting board.

    Slice the pork belly thinly from the middle and use both hands to tightly roll it up into a firm cylindrical shape. Keeping the roll tight ensures the meat stays intact during the long braising process and holds a beautiful round shape when sliced.

    Tip: A tight roll is essential for good chashu. Take your time to compress the meat firmly as you roll.
  2. 2Tie the pork belly roll
    A hand holding a piece of raw pork belly tightly rolled and secured with white cooking twine over a pink cutting board.

    Secure the tightly rolled cylinder by tying it with white cooking twine at regular intervals. This ensures the meat holds its shape perfectly during the pan-frying and braising processes, resulting in beautiful, round chashu slices.

    Tip: Tie the twine snugly to hold the shape, but avoid tying it so tight that it deeply cuts into the meat.
  3. 3Pan-fry the pork rolls
    Two tied pork belly rolls searing in a pan with hot oil until golden brown on all sides.

    Place the tied pork belly rolls into a hot pan with a little oil. Pan-fry them over medium-high heat, turning occasionally, until all sides achieve a rich, golden-brown crust. Searing the meat renders out excess fat and creates a deep, savory foundation for the braise.

    Tip: Dont rush the searing step; the caramelized crust adds significant depth of flavor to the final soup base.
  4. 4Add water and aromatics
    Pouring clear water into a cooking pot containing pan-fried pork belly rolls, aromatics, and spices.

    Transfer the seared pork belly rolls into a large pot. Add the prepared aromatics including sliced scallion, ginger, garlic, star anise, and a bay leaf. Pour in enough clear water to fully submerge the pork and the spices.

    Tip: Start with plenty of water to ensure the pork cooks evenly without drying out during the long simmer.
  5. 5Season the braising liquid
    Adding dark soy sauce into a pot of braising liquid with pork belly rolls and spices.

    Add cooking wine, light soy sauce, dark soy sauce, and rock sugar into the pot. Bring the liquid to a rolling boil over high heat, then reduce the heat to medium, cover, and let it simmer gently for 2 hours to tenderize the pork.

    Tip: The dark soy sauce provides the classic deep mahogany color, while the rock sugar balances the savory notes with a gentle sweetness.
  6. 6Add the boiled egg
    A peeled hard-boiled egg being placed with a slotted spoon into a glass dish filled with dark braising liquid and two tied rolls of pork belly.

    Carefully lower a peeled, hard-boiled egg into the dark braising liquid alongside the tied pork belly rolls. Ensure the egg is sufficiently submerged so it can evenly absorb the deep colors and savory flavors of the soy sauce and aromatics.

    Tip: For the most intense flavor and color, let the pork belly and egg steep in the braising liquid in the refrigerator overnight after the initial cooking.
  7. 7Slice the chilled pork belly
    Thinly sliced, perfectly round pieces of braised pork belly resting next to the main roll on a wooden cutting board.

    Once the braised pork belly has completely chilled in the refrigerator overnight, carefully remove and discard the cooking twine. Use a sharp knife to slice the pork roll into thin, even rounds. Chilling the meat solidifies the fat, making it much easier to slice cleanly without the roll falling apart.

    Tip: Always slice the pork while it is fully cold; warm pork belly is too tender and will easily shred under the knife.
  8. 8Open the ramen packet
    Two hands tearing open a bright green packet of instant ramen, exposing the plastic tray inside.

    Prepare the instant ramen by opening the outer packaging. Take out the dry noodle block and the included seasoning packets. Having all the components ready before boiling the water ensures a smooth and quick cooking process.

    Tip: Be careful not to crush the noodle block when opening the package if you prefer long, intact noodles in your soup.
  9. 9Prepare the tonkotsu broth
    Brown seasoning paste being squeezed from a green packet into a pot of simmering, milky broth dotted with oil.

    Bring a pot of water to a boil, then squeeze the contents of the seasoning packet directly into the water. Stir well to dissolve the paste completely. This creates the rich, creamy, and flavorful tonkotsu soup base for the noodles.

    Tip: Add the seasoning paste before adding the noodles to ensure the flavor is evenly distributed throughout the boiling broth.
  10. 10Remove the noodles
    Black chopsticks pulling a portion of cooked wavy ramen noodles out of a creamy milky broth.

    Once the ramen noodles are cooked and softened in the seasoned broth, use a pair of chopsticks to carefully lift them out. Transfer the hot noodles directly into your serving bowl.

    Tip: Keep a close eye on the boiling time—ramen noodles cook very quickly and are best served with a slight chew.
  11. 11Add the tonkotsu soup
    A stream of creamy, rich tonkotsu broth being poured over a bed of cooked ramen noodles in a serving bowl.

    After transferring the noodles, carefully pour the hot, creamy tonkotsu soup directly into the serving bowl. Ensure the noodles are nicely submerged in the rich broth.

    Tip: Pouring the hot soup over the noodles immediately helps them stay warm and ready to absorb the savory flavors.
  12. 12Arrange the chashu pork
    Chopsticks carefully placing slices of braised rolled pork belly into a bowl of hot tonkotsu ramen.

    Use chopsticks to pick up the slices of braised pork belly you prepared earlier. Gently lay the chashu slices over the noodles and hot soup, arranging them neatly along the edge of the bowl for a beautiful presentation.

    Tip: The residual heat from the hot tonkotsu soup will gently warm the chilled pork belly slices, melting the fat slightly for an incredibly tender bite.

Storage & Reheating

Refrigerator
Up to 4 days
Store the remaining chashu roll and braising liquid together in an airtight container.
Freezer
Up to 2 months
Freeze leftover chashu slices wrapped tightly in plastic wrap. Thaw overnight in the fridge before using.
Reheating
2–3 min
Gently warm chashu slices in the hot ramen broth or sear them briefly in a pan. Avoid microwaving, which can dry out the fat.

Burn It Off

Running
~80 minutes at a vigorous pace (~10 kmh).
Hyrox
~90 minutes of high-intensity functional training.
Pickleball
~2 hours of active competitive play.

Frequently Asked Questions

Yes! While this recipe uses Master Kong, any premium instant tonkotsu ramen (such as Nissin Roah or Marutai) will work beautifully.
Tying the pork tightly ensures it holds its signature round shape during the long simmer and doesnt fall apart when you slice it.
You can eat it the same day, but chilling it overnight solidifies the fat, making it much easier to slice into clean, thin rounds. It also allows the meat to absorb significantly more flavor.
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