Signature Tonkotsu Ramen Recipe
9+ hours Pork Bone Broth, Pork Chashu, Dried Seaweed, Bean Sprouts
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Ingredients
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Pork Bone Broth (Tonkotsu)
Pork Chashu
Noodles & Toppings
Soup Base Seasoning (Tare)
Method
Pork Bone Broth (Tonkotsu)
- 1
Blanch bones
Place all pork bones in a large stockpot and cover with cold water. Bring to a rolling boil over high heat for 15 minutes to remove impurities. Skim foam vigorously.
- 2
Clean bones
Drain bones and discard blanching water. Rinse bones and pot under hot running water to remove scum and marrow debris.
- 3
Initial sauté (optional)
Return bones to the pot, add 1 tablespoon vegetable oil and briefly brown bones over medium-high heat (3–5 minutes) to deepen flavor. This step is optional but recommended for richer color.
- 4
Add aromatics and water
Add 6 liters of fresh cold water to the pot with bones. Add halved onion, halved garlic heads, smashed ginger, and white parts of green onions. Bring to a rolling boil.
- 5
Long simmer
Once boiling, reduce heat to maintain a vigorous simmer (not a rolling boil that breaks bones) and simmer uncovered for at least 9 hours, ideally 10–12 hours. Every 1–2 hours, skim any scum and occasionally stir bones to expose marrow.
- 6
Add kombu and katsuobushi
In the last 20 minutes of simmering, add kombu and simmer gently for 10 minutes, then remove kombu. Add bonito flakes, simmer 5–10 minutes, then strain broth through a fine-mesh sieve lined with cheesecloth into a clean pot.
- 7
Reduce and clarify (optional)
Return strained broth to heat and simmer uncovered to reduce slightly for more body (30–60 minutes). Taste and season with kosher salt and white pepper lightly. Keep hot or cool and refrigerate. Broth will become opaque, creamy, and gelatinous when chilled — characteristic of tonkotsu.
Pork Chashu
- 8
Roll and tie pork belly
Roll the pork belly tightly into a log and tie at 1-inch intervals with kitchen twine to hold shape for even slicing.
- 9
Sear
Heat a skillet over medium-high heat and sear the rolled pork belly on all sides until golden brown (3–4 minutes per side). This develops flavor and seals juices.
- 10
Braise
In a saucepan large enough to hold the rolled pork, combine soy sauce, mirin, sake, sugar, water, crushed garlic, sliced ginger, and green onion pieces. Add the seared pork belly and bring to a gentle simmer. Cover and simmer on low for 1.5–2 hours, turning occasionally, until pork is very tender.
- 11
Cool in braising liquid
Remove pork and let it cool slightly. Reduce remaining braising liquid over medium-high heat until syrupy (5–10 minutes) and brush over pork. For best flavor, cool pork in the braising liquid (off heat) to absorb flavor; refrigerate for at least 2 hours or overnight to firm up for clean slicing.
- 12
Slice
Remove twine and slice chilled chashu into 1/4-inch thick rounds. Warm briefly in a little of the reduced sauce before plating if desired.
Noodles & Toppings
- 13
Prepare soft-boiled eggs (ajitsuke tamago)
Bring a small pot of water to a rolling boil. Carefully lower room-temperature eggs and boil 6–7 minutes for jammy yolk. Immediately transfer to an ice bath for 5 minutes. Peel and marinate in a mix of 1/2 cup soy sauce, 1/2 cup water, and 1/4 cup mirin for at least 1 hour (preferably overnight). Halve before serving.
- 14
Prepare bean sprouts
Blanch bean sprouts in boiling water for 30–45 seconds until just tender-crisp. Drain and toss with 1 tsp sesame oil and toasted sesame seeds. Keep warm.
- 15
Toast nori
If not pre-toasted, briefly pass nori sheets over an open flame or in a dry skillet until crisp. Halve sheets for plating.
- 16
Soup Assembly & Finishing
- 17
Warm tare
Warm the concentrated tare gently. Place approximately 3 tablespoons of tare into each serving bowl (adjust to taste).
- 18
Heat and finish broth
Reheat the strained tonkotsu broth to a rolling hot but not boiling. If broth is too thick after chilling, whisk in a little reserved hot water or noodle water to loosen. Taste and adjust seasoning by adding soy or mirin teaspoons as listed in seasoning ingredients.
- 19
Assemble bowls
Pour ~700–750 ml (about 3 cups) of hot broth into each bowl over the tare to combine. Place cooked noodles in the bowl if not already. Top with 3–4 slices of warm chashu, half a marinated soft-boiled egg, a small handful (~1 cup) of dressed bean sprouts, a sheet of nori tucked into the side, and a sprinkle of sliced green onions and sesame seeds. Add chili oil or rayu if desired.
- 20
Serve
Serve immediately while hot. Provide extra tare or chili oil on the side for individual adjustment.