Tonkotsu Ramen Recipe

Prepare bones

Rinse bones under cold water. Place bones and trotters in a large stockpot and cover with cold water. Bring to a rolling boil over high heat for 10 minutes to blanch and remove impurities.

After boiling 10 minutes, drain the bones into a colander and discard the blanching water. Rinse bones thoroughly under cold running water and scrub the pot to remove any scum.

Fill the pot with ~6 liters fresh cold water. Add the cleaned bones back to the pot. Add smashed ginger, chopped white parts of green onions, halved onion, smashed garlic, kombu, and dried shiitake.

Bring to a gentle boil, then immediately reduce to a vigorous simmer. Simmer uncovered for 12–18 hours, maintaining a low vigorous simmer (not a rolling boil) — this emulsifies marrow and fat into the broth making it silky. Skim foam occasionally for a cleaner flavor, but expect the broth to turn opaque and creamy.

During the last 30 minutes, remove kombu to avoid bitterness. Taste and season very lightly with salt if needed — final seasoning will be with tare.

When broth has reached desired richness (12–18 hours), strain through a fine-mesh sieve lined with cheesecloth into a clean container. Press solids gently to extract as much liquid and collagen as possible. Cool slightly and refrigerate if not using immediately. Degrease desired amount from the surface if you want a less fatty bowl; for authentic silky tonkotsu, keep some emulsified fat.

In a small saucepan, combine soy sauce, mirin, sake, salt, and bonito flakes. Warm over medium heat until just below a simmer, then lower heat and steep for 5 minutes to extract umami from the bonito.

Strain the tare through a fine sieve to remove bonito flakes. Cool and store. Use approximately 2–3 tablespoons of tare per serving when assembling bowls; adjust to taste.

Roll and tie the pork belly with kitchen twine to form a tight log. Sear the belly in a hot pan with 1 tablespoon vegetable oil until browned on all sides to develop flavor.

Combine soy sauce, mirin, sake, water, brown sugar, smashed garlic and sliced ginger in a pot large enough to hold the pork belly. Add the seared pork belly and bring to a simmer.

Reduce heat to low, cover with a lid slightly ajar, and simmer gently for 1.5–2 hours until very tender. Turn the pork periodically to ensure even braising and that it soaks up the braising liquid.

Remove pork from braising liquid and let cool slightly. Strain and reserve braising liquid. For best slices, refrigerate the pork (and optionally the braising liquid) until firm, then slice into 1/4-inch rounds. Reheat slices briefly in warmed braising liquid before serving.

Soft-boiled eggs: Bring a pot of water to a boil. Lower eggs gently and cook 6–7 minutes for jammy yolks (adjust by egg size). Immediately transfer eggs to an ice bath. Peel and marinate in a little tare or soy-mirin mix for at least 1 hour (overnight for best flavor).

Cook fresh ramen noodles in a large pot of vigorously boiling water according to package instructions (usually 45–90 seconds). Do not overcook; fresh noodles should be chewy. Drain and briefly rinse only if necessary to separate, then return to hot water very briefly to reheat and drain well.

Warm bowls by rinsing with hot water. For each bowl, add 2–3 tablespoons of tare to the bottom (adjust by taste). Ladle approximately 500 ml of hot tonkotsu broth into each bowl and stir to dissolve the tare into an even flavored soup base.

Place a serving of cooked ramen noodles into each bowl of seasoned broth. Top each bowl with 2–3 slices of warmed chashu, one halved marinated soft-boiled egg, a handful of menma, sliced green onions, a half sheet of nori, a sprinkle of toasted sesame seeds, and a few drops of sesame oil. Add benishoga or chili oil if using.

Taste and adjust with extra tare or salt to taste. Serve immediately while piping hot.