Yes: you can make tonkotsu ramen broth in a pressure cooker, and it comes out opaque, milky and rich in about 4 hours instead of the usual 12-plus. The pressure cooker does the slow part, pulling collagen and fat out of pork bones in 90 minutes. Then a hard, open boil does what pressure alone can’t: it whips that fat and gelatin into the creamy emulsion that makes a bowl of tonkotsu look and taste the way it should.
Below you’ll find the full method, from blanching the bones to the soy tare, a black garlic oil and jammy marinated eggs, with exact amounts for 4 bowls. It’s written for a 6- or 8-quart electric pressure cooker, with notes for stovetop models and for a plain stockpot.
- Recipe
- Pressure Cooker Tonkotsu Ramen
- Why This Tonkotsu Ramen Works
- Pressure Cooker Size, Fill Line and Timing
- Tips for a Milky Tonkotsu Broth
- Common Mistakes to Avoid
- Substitutions That Work (and One That Doesn't)
- Make-Ahead and Storage
- Our Top Picks for Pressure Cooker Ramen
- Frequently Asked Questions
- Final Thoughts
At a Glance
- Time: about 4 hours 15 minutes start to finish (90 minutes at high pressure), about 1 hour of active time. Marinate the eggs the night before.
- Makes: about 6 cups (1.4 L) of broth, enough for 4 bowls.
- Difficulty: intermediate. No special skills, just a few separate components.
- The one thing that makes it work: a 45- to 60-minute rolling boil with the lid off after pressure cooking. That’s what turns a clear pork stock into a milky tonkotsu.
- Equipment: a 6- or 8-quart electric pressure cooker, a large stockpot for blanching and a fine-mesh strainer.
Recipe
This pressure cooker tonkotsu ramen makes 4 bowls. Pork trotters (pig’s feet) are what give the broth its body: they’re packed with collagen, which turns into gelatin under pressure. Ask the butcher to split them and to crack the leg or neck bones so the marrow is exposed.
Prep: 30 min · Cook: about 3 hr 45 min (including time to come up to pressure and natural release) · Egg marinade: 8 hr, made ahead · Total: about 4 hr 15 min, plus the eggs · Servings: 4
Pressure Cooker Tonkotsu Ramen
Ingredients
Method
- Marinate the eggs (the night before). Bring the soy sauce, mirin, sake and sugar to a boil, simmer 1 minute and let it cool completely. Lower the cold eggs into a pot of boiling water, start a timer and keep the water at a gentle simmer for 7 minutes (6½ for a runnier yolk). Move them to ice water for 15 minutes, peel, then seal them in a zip-top bag with the cooled marinade. Refrigerate 8 hours or overnight, but no longer than 24 hours or they turn too salty.
- Blanch the bones. Put the bones and trotters in a large stockpot, cover with cold water and bring to a boil over high heat. Boil 10 minutes, until a thick gray foam rises and no more blood seeps from the bones.
- Clean them well. Drain, then rinse each piece under cold running water, scrubbing off dark clots and any loose bits of marrow. This step decides how clean your broth tastes, so don’t skip it. Wash out the pot too.
- Load the pressure cooker. Put the cleaned bones, garlic and ginger in the inner pot and add the 8 cups of water. The water must stay at or below the PC MAX (⅔) line. If it’s above the line, hold some water back and add it during the boil in step 7.
- Pressure cook. Lock the lid, set the valve to Sealing and cook on High Pressure for 90 minutes. Expect about 30 to 40 minutes for a full pot to come up to pressure.
- Let the pressure release naturally. Leave the valve closed until the float valve drops, about 30 minutes. A full pot of fatty broth will sputter through the valve on a quick release, so be patient here.
- Boil hard to emulsify. Remove the lid, add the onion and scallion whites, and switch to Sauté on High (or pour everything into the stockpot over high heat). Keep the broth at a hard, rolling boil, uncovered, for 45 to 60 minutes. Stir and scrape the bottom every 10 minutes so the gelatin doesn’t scorch. It’s ready when it’s opaque, ivory-white and lightly coats a spoon.
- Make the tare while the broth boils. Heat the soy sauce, mirin, sake, water and kombu in a small saucepan until it almost boils, then simmer on low 3 to 4 minutes. Turn off the heat, stir in the salt until it dissolves and let it cool. Remove the kombu. It makes about ½ cup.
- Make the black garlic oil (optional). Cook the sesame oil and grated garlic in a small saucepan over medium-low heat, stirring constantly, until the garlic is very dark brown. Lower the heat and keep stirring until it turns black. Pour it into a heatproof bowl, cool completely, then blend until smooth. Turn on the vent fan: it smokes. It tastes bitter on its own, which is normal.
- Strain. Pour the broth through a fine-mesh strainer into a large bowl, pressing on the solids. You should have about 6 cups (1.4 L). If you have more, boil it down; if less, add hot water.
- Assemble. Warm 4 deep bowls with hot water, empty them and add 2 tablespoons of tare to each. Bring the broth back to a boil. Cook the noodles according to the package (thin fresh noodles usually take 1 to 2 minutes) and drain them well. Pour 1½ cups (350 ml) of hot broth into each bowl, stir, then add the noodles. Top with 2 slices of chashu, a halved egg, scallions, menma and nori. Finish with about 1 teaspoon of black garlic oil and serve right away. Taste and add a little more tare if needed.
✓ Kitchen-tested · Nicole cooked this recipe in our kitchen on October 2, 2026. What this means
Why This Tonkotsu Ramen Works
- Trotters for body. Pig’s feet are mostly skin, tendon and cartilage. Under pressure, that collagen turns into gelatin fast, which is what gives tonkotsu its lip-sticking richness.
- Blanching first. The quick boil and scrub removes blood and impurities that would otherwise turn the broth gray and gamey.
- Pressure for extraction, a boil for emulsion. A sealed pot barely moves, so it extracts well but stays clear. The open, rolling boil afterward breaks the fat into tiny droplets that the gelatin holds in suspension. That’s the milky look.
- Seasoning in the bowl, not the pot. The broth itself is unsalted. The tare goes into each bowl, so you control the salt and can reduce leftover broth without making it too salty.
Pressure Cooker Size, Fill Line and Timing
Bones take up a lot of room, so pot size decides your batch. In a 6-quart pot, 4 pounds of bones plus 2 quarts of water sits right around the ⅔ line. An 8-quart pot such as the Instant Pot Duo Plus 8 Qt lets you scale up by half. Not sure which size you own or need? Our Instant Pot size guide breaks down what fits in each.
| Equipment | Batch | Time |
|---|---|---|
| 6-qt electric pressure cooker | 4 lb (1.8 kg) bones + 2 qt (1.9 L) water, max | 90 min High Pressure, natural release, then 45-60 min boil |
| 8-qt electric pressure cooker | Up to 6 lb (2.7 kg) bones + 3 qt (2.8 L) water | Same timing; the boil may take closer to 60 min |
| Stovetop pressure cooker | Fill no more than ⅔ | Same timing at high pressure, on the lowest heat that holds pressure |
| Stockpot, no pressure | Bones covered by 1 inch of water | 6-12 hours at a steady boil, topping up with water |
Safety Notes
- Never fill past the PC MAX (⅔) line. For anything that foams a lot, manufacturers say to stay at half; well-blanched bones foam much less, which is one more reason not to skip step 2.
- Use natural release. A full pot of fatty liquid can spray through the valve on a quick release.
- During the Sauté boil, scrape the bottom every 10 minutes. Gelatin sticks and scorches, which can also trigger the Instant Pot burn message on the next use if residue is left behind.
- Cool leftover broth quickly (an ice bath works) before refrigerating.
Pressure gets the collagen out of the bones. The hard boil afterward is what makes the broth milky.
Tips for a Milky Tonkotsu Broth
Quick Tips
- Ask for cracked bones. Exposed marrow gives more flavor and color in the same 90 minutes.
- Judge by the spoon, not the clock. The broth is done when it’s opaque and coats the back of a spoon. If it still looks thin, keep boiling.
- Keep it at a real boil. A gentle simmer won’t emulsify. You want big, rolling bubbles across the whole surface.
- Split the work. Make the eggs, tare and garlic oil a day ahead. On ramen day, you only make the broth and cook the noodles.
Common Mistakes to Avoid
- Skipping the blanch. The broth turns grayish and smells strongly of pork.
- Serving straight from the pressure cooker. Without the open boil, you get a good pork stock, but it stays clear and thin.
- Salting the pot. Season each bowl with tare instead. Salted broth gets saltier as it reduces.
- Trying it in a slow cooker. A slow cooker never reaches a rolling boil, so the broth can’t emulsify. Our slow cooker to Instant Pot guide explains why the two cook so differently.
- Overcooking the noodles. Thin fresh noodles go soft in seconds. Cook them last, drain them well and serve immediately.
Substitutions That Work (and One That Doesn’t)
| Swap | Result |
|---|---|
| Pork hock with skin instead of trotters | Works well. Slightly less body, still creamy. |
| Leg (femur) bones instead of neck bones | Works. Have them cracked so the marrow is exposed. |
| Water instead of sake | Fine in both the tare and the egg marinade. |
| Dried ramen noodles instead of fresh | Good backup. Avoid instant noodle bricks, which go soft. |
| Toasted sesame oil instead of black garlic oil | Quick and still aromatic, just less smoky. |
| Chicken bones only | Doesn’t make tonkotsu. You’ll get a lighter chicken broth (a different style). |
Make-Ahead and Storage
Store the broth and noodles separately. Strained broth keeps 3 days in the refrigerator or about 1 month in the freezer; it sets into a firm jelly when cold, which is a good sign. Bring it back to a full boil before serving, and whisk it if the fat has separated.
The tare keeps at least a week in the fridge. Marinated eggs are best within 3 to 4 days, out of the marinade. Cook noodles fresh for every serving.
Our Top Picks for Pressure Cooker Ramen
- Instant Pot Duo Plus 8 Qt — an 8-quart electric pressure cooker with room for a 1½-times batch of bones, and a Sauté setting for the emulsifying boil. Around $130-160.
- Farberware Classic 12-Quart Stockpot — big enough to blanch 4 to 6 pounds of bones, and the pot to use if you’d rather do the final boil on the stove. Around $60-70.
- Winco 8-Inch Fine Mesh Strainer — a stainless fine mesh with a long handle and a bowl hook, for straining the broth smooth. Around $10-15.
Product picks are research-based: manufacturer specs, verified buyer feedback and independent reviews such as Food Network’s pressure cooker reviews. We haven’t tested these specific models ourselves. Last verified: October 9, 2026. How we work.
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may change — please verify on Amazon before buying.
Frequently Asked Questions
Is pressure cooker tonkotsu as good as a 12-hour broth?
It’s very close. The pressure cooker extracts the collagen and flavor in a fraction of the time, and the open boil gives you the same milky body. Some ramen shops still prefer long boiling for an even deeper pork flavor, but at home the difference is small.
Why did my tonkotsu broth come out clear instead of milky?
It wasn’t boiled hard enough, or long enough, after pressure cooking. The milky color comes from an emulsion of fat and gelatin, which only forms with vigorous bubbling. Put it back on high heat, uncovered, and keep it at a rolling boil until it turns opaque. You can read more about the style on Wikipedia’s ramen page.
Can I make tonkotsu ramen broth in a 3-quart pressure cooker?
Only a small batch. Halve the recipe (2 lb bones, 1 quart water) and stay under the ⅔ line, which gives about 2 bowls. For 4 bowls, a 6-quart or larger pot is the practical minimum.
Final Thoughts
So, can you make tonkotsu ramen broth in a pressure cooker? Absolutely, as long as you treat the pressure cooker as step one and give the broth its hard boil afterward. Make the eggs and tare the night before, and ramen day becomes about an hour of active time.
Find more pressure cooker recipes in our Pressure & Slow Cooking section, or browse Weeknight Dinners for faster bowls on busy nights.
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