Tonkotsu-Style Pork Bone Ramen with Chashu
In the spirit of Homemade Ramen by Sho Spaeth

Photo: Wikimedia Commons
Chef’s own recipe, written so you can cook the way this book teaches tonight. It is not the book’s recipe: for those, get the book.
Tonkotsu-Style Pork Bone Ramen with Chashu
Serves 4 ยท 2 days (about 8 hours active)
This is the project bowl: a rich, creamy pork broth that you simmer hard for hours until the bones release their collagen, plus a braised pork belly you can slice thin. It takes planning, but every component is simple, and the broth is the part that makes ramen feel like ramen.
You need
- 3 lb (1.4 kg) pork neck bones or trotters, cut into pieces
- 1 lb (450 g) pork back fat or fatty pork scraps (optional, for richness)
- 1 whole head garlic, halved
- 4-inch (10 cm) piece fresh ginger, sliced
- 1 large onion, halved
- 3 scallions, cut into pieces
- For the chashu: 2 lb (900 g) skin-on pork belly, rolled and tied
- 1/2 cup (120 ml) soy sauce
- 1/2 cup (120 ml) mirin
- 1/4 cup (50 g) sugar
- 4 cups (960 ml) water, for the braise
- 3 cloves garlic, smashed
- 2-inch (5 cm) piece ginger, sliced
- 1 star anise (optional)
- For serving: 4 portions fresh ramen noodles (about 14 oz / 400 g), 4 soft-boiled eggs (see below), 2 scallions sliced, 1 sheet nori, 1 cup bean sprouts, toasted sesame seeds
- Kansui or baking soda is not needed; use store-bought fresh noodles
Method
- Blanch the bones: put the bones in a large pot, cover with cold water, and bring to a boil over high heat. Boil 10 minutes, watching for grey foam and scum to rise. Drain, rinse the bones under warm water, and scrub the pot clean.
- Start the broth: return the bones to the clean pot with 5 quarts (4.7 L) of fresh cold water, the back fat if using, garlic, ginger, onion, and scallions. Bring to a rolling boil, then lower to a steady simmer, uncovered, at a bubble every second or two.
- Simmer 6 to 8 hours, topping up with hot water as the level drops. The broth should turn cloudy, pale, and thick enough to coat a spoon, and the fat should emulsify into it. Strain through a fine sieve and keep warm. Refrigerate overnight for easier fat removal if you prefer a lighter bowl, then reheat.
- Braise the chashu: in a pot just big enough to hold the pork, combine the soy sauce, mirin, sugar, water, garlic, ginger, and star anise. Bring to a simmer, add the pork, and cover with a parchment lid. Cook at a gentle simmer, about 180 F (82 C), for 2 hours, turning once, until a fork slides in with little resistance.
- Rest and slice: let the pork cool in its braising liquid, then chill it for at least 2 hours so it firms up for clean slices. Slice into 1/4-inch (6 mm) rounds. Warm the slices briefly in a little of the braise before serving.
- Soft-boil the eggs: for each egg, lower into boiling water for exactly 6 minutes 30 seconds, then chill in ice water. Peel and marinate in 1/4 cup of the braise for at least 2 hours if you have time. Each yolk should be jammy.
- Cook the noodles in boiling water 1 to 2 minutes, until just tender. Drain well.
- Serve: season the hot broth lightly with salt or extra soy to taste. Ladle into warm bowls, add the noodles, lay on 3 or 4 slices of chashu, halve an egg, and garnish with scallions, nori, bean sprouts, and sesame seeds. Eat immediately.
Chef's tip: Keep the broth at a steady simmer rather than a hard boil. A hard boil emulsifies the fat too aggressively and can make the broth greasy and muddy.
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Also: Quick Shoyu Tare Ramen Bowl →
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