Tonkotsu Ramen Recipe

Prepare and blanch bones

Rinse bones under cold water to remove surface blood. Place bones in a large stockpot, cover with cold water, bring to a rolling boil over high heat for 10–15 minutes. During boiling skim off scum that rises. After the initial boil, drain bones and discard the blanching water. Rinse bones and the pot to remove remaining impurities.

Roast (optional for deeper flavor)

Preheat oven to 425°F (220°C). Pat bones dry, toss with 1 tbs oil, and spread on a sheet pan. Roast 30–40 minutes until nicely browned. Roasting is optional but yields nuttier color and richer flavor.

Simmer the broth

Transfer the blanched (and optionally roasted) bones to a clean large stockpot. Add 6 liters of fresh cold water, ginger, garlic, scallion whites, onion, and shallot. Bring to a vigorous simmer over high heat, then reduce to maintain a steady rolling simmer (not a gentle simmer) — the agitation helps extract collagen and fat for a milky broth. Simmer uncovered for 8–12 hours, occasionally skimming excess scum and fat from the surface during the first 2 hours. If the broth reduces too much, top up with hot water to keep bones covered.

Optional umami boost

In the last 30–60 minutes add the optional koji rice or kombu and, if using, a small piece of kombu removed after 30 minutes to avoid bitterness. If using bonito flakes or dashi, steep separately and combine with the strained broth to taste.

Strain and finish

When the broth is milky, remove from heat. Strain through a fine-mesh sieve lined with cheesecloth into a clean container to remove solids. Press gently to extract liquid. Let cool slightly, then refrigerate overnight so fat rises and solidifies. Skim excess fat (reserve some for mouthfeel). Season lightly with salt only at the end; most seasoning comes from tare.

Make a simple shoyu tare by combining 1 cup light soy sauce, 1 tbs mirin, 2 tbs sake, and 2 tbs white miso in a small saucepan. Add 1 cup dashi or strained bonito infusion if using. Warm gently over low heat just to dissolve miso and combine flavors; do not boil hard. Taste and adjust: tare should be concentrated and salty — about 2–3 tbsp tare per bowl of broth, adjusted to preference. Cool and store in the refrigerator until service.

Roll the pork belly into a tight log and tie with kitchen twine. In a pot combine 1 cup soy, 1 cup mirin, 1 cup sake, 2 cups water, 3 tbs sugar, crushed garlic and sliced ginger. Add the rolled pork belly and bring to a simmer. Skim foam, then reduce heat to low and simmer gently, covered, for 1.5–2 hours until very tender and easily pierced with a skewer. Turn the meat occasionally to glaze evenly.

Remove pork and let cool in the braising liquid. For best flavor, refrigerate the pork in the liquid overnight; this firms the meat for clean slices and allows the marinade to penetrate. When ready to serve, slice into 1/4-inch (6 mm) rounds and reheat briefly in warmed braising liquid or a pan to glaze.

Bring a pot of water to a gentle boil. Lower eggs (at room temperature) into the water and boil for 6 minutes for jammy yolks (adjust 6–7 minutes depending on size). Immediately transfer eggs to an ice bath to stop cooking and cool completely, about 5 minutes. Peel carefully.

Make a quick marinade with 1/2 cup soy sauce, 1/2 cup mirin and 1/4 cup water (or use some of the tare). Submerge peeled eggs in marinade in a container and refrigerate 4–24 hours depending on desired saltiness. Remove and slice in half when ready to serve.

Warm the strained tonkotsu broth. Reheat gently — do not boil hard — and skim any fat as desired. For each bowl, spoon 2–3 tablespoons of tare into the bottom.

Bring a separate pot of water to a rolling boil. Cook fresh ramen noodles according to package directions (typically 60–90 seconds for fresh thin noodles) until just tender. Do not overcook. Drain well.

Ladle hot broth over the tare (about 500 ml per serving, adjust to bowl size) and taste; adjust with additional tare or salt if needed.

Add noodles to the bowl, then top with 2–3 slices of chashu, half a marinated soft-boiled egg, a sheet or strip of nori, a tablespoon menma, a handful of bean sprouts if using, sliced scallions, a drizzle of sesame oil or sprinkle of toasted sesame seeds, and a small spoon of mayu (black garlic oil) if desired.

Serve immediately while piping hot. Offer extra tare, chili oil, or sesame seeds at the table for individual adjustment.