Why Do You Boil Tonkotsu Broth for So Long? (2024)

First, let's define "tonkotsu". It translates into "pig bone" or "pork bone" in Japanese. But none of us are going to order a bowl of "pig bone ramen". So tonkotsu generally refers to the thick, rich broth created by boiling the pork bones. Simply put - it's the Holy Grail of ramen broths.

You may never notice the silky texture of the tonkotsu broth as part of the finished bowl of ramen. By the time it reaches your restaurant table, the broth is filled with flavors, spice, noodles and toppings. At that point, it's often about "taste" instead of texture. But if you are going to make a tonkotsu broth at home, you can easily examine how silky smooth that broth base gets after you finish the boiling process.

Now, back to our central question: why do you boil tonkotsu broth for so long? Simply put, you are extracting marrow and collagen from the pork bones. You'll never get a truly gelatinous tonkotsu broth with a slow simmering approach as we do with clear and aromatic broths. Nor will you get the best version of that tonkotsu broth with a short boil. A couple of hours just won't cut it.

We boil our tonkotsu broth for 12 or more hours. Often we finish at more than 13 hours. We use pork feet bones along with pork neck and occasionally pork back bones. As the boiling starts, the bones start to break down or collapse from the high heat and boiling water. As hours pass, the collagen, marrow and fat from the bones are emulsified into the water.

In the ramen making classes I teach, students are always surprised by the color of the broth after the extended boiling. We use a very pure approach: bones + water + boil. The finished liquid tonkotsu broth is quite milky white in color. That's because the marrow, collagen and all the goodness of the bones are dissolved and woven into the liquid broth over the many hours of boiling.

We use ramen meters to test the viscosity of the broth after 12 hours of boiling. Digital meters are expensive. Analog versions are less so. Still, I always tell my students that if you are just doing this at home and don't want to invest the money in ramen meters, make your first boil at least 8 hours. The next time boil for 10 hours to notice the difference. Then on your third attempt, boil for 12 hours. This way you can see how the marrow and collagen breakdown change the broth in the last 4 to 5 hours of boiling.

Why Do You Boil Tonkotsu Broth for So Long? (2)

Jeff Parsons is the Co-founder at The Story of Ramen.

Why Do You Boil Tonkotsu Broth for So Long? (2024)

FAQs

Why Do You Boil Tonkotsu Broth for So Long? ›

As the boiling starts, the bones start to break down or collapse from the high heat and boiling water. As hours pass, the collagen, marrow and fat from the bones are emulsified into the water. In the ramen making classes I teach, students are always surprised by the color of the broth after the extended boiling.

How long should you let ramen broth simmer? ›

I thought of publishing a tonkotsu (pork bones) ramen but making a tonkotsu ramen broth is an extremely time-consuming process, requiring the broth to be simmered for a minimum of 6-8 hours, preferably 14+ hours.

How long to boil tonkotsu broth reddit? ›

Cooked half in a pot with aromatics for ~12 h and the other half without aromatics in the pressure cooker for ~4h.

Should tonkotsu broth be covered or uncovered? ›

Cover the stockpot and continue boiling for 12 hours. It is essential that the bones remain submerged during cooking so be sure to check the stock every half hour or so and add water if required. By boiling and not just simmering the bones, the stock will turn a milky beige.

How long can you boil pork bones for? ›

If the bones are raw boil them for about an hour. If the meat on the bones is cooked, boil about a half hour or until the meat begins to leave the bones. Bring to a boil, then reduce to a simmer and cover. Cook for at least 10-12 hours, or until reduced by 1/3 or 1/2, leaving you with 6-8 cups of bone broth.

How to know when tonkotsu broth is done? ›

Return lid to pot and continue cooking until broth is opaque with the texture of light cream, about 6 to 8 hours longer, topping up as necessary to keep bones submerged at all times.

Why does ramen broth take so long? ›

We use pork feet bones along with pork neck and occasionally pork back bones. As the boiling starts, the bones start to break down or collapse from the high heat and boiling water. As hours pass, the collagen, marrow and fat from the bones are emulsified into the water.

How healthy is tonkotsu broth? ›

However, broth made from pork and chicken bones is actually very beneficial for your health. The digestive tract lining, immune system, aid in overcoming food allergies, and joint health are all said to benefit from the bone's collagen.

Why is tonkotsu broth creamy? ›

Tonkotsu ramen broth is simply pork bones cooked at a rolling boil for 12 hours. The process extracts all the goodness of the pork and turns the broth creamy white.

Why is my tonkotsu broth clear? ›

Boiling. Fats in your stock emulsify with the water when the stock boils. This is why a milky white tonkotsu ramen broth (which is produced via a rapid boil) is much cloudier than a stock with the same ingredients that is never boiled.

Are you supposed to drink tonkotsu broth? ›

Are you supposed to drink the broth in ramen? You should drink the broth when eating the noodles and toppings as they are meant to be eaten together.

Are thin or thick noodles better for tonkotsu? ›

Thin and curly noodles are perfect for thicker broths like Tonkotsu or Tsukemen, because of how the broth is held within each curl. Thin and straight noodles tend to stick together. When the noodles stick together this way, they create a scoop shape that allows delicious broth to be trapped up in every bite.

Can you boil pork for too long? ›

Even though ribs are usually slathered in BBQ sauce or glaze, you can still get seriously dried out and tough meat from boiling - especially if you accidentally boil it for too long and toughen it up instead of tenderizing as intended.

How long should I boil bone broth? ›

When the pot boils, turn the heat down to low and simmer for 16 to 18 hours. Skim the surface again as needed when you check on the pot during the cooking period. At the end of the cooking period, scoop out and discard the solids and pour the broth through a fine mesh sieve.

Why do you have to boil bones for so long? ›

Bone broth is made by boiling the roasted bones and connective tissue over a long period of time. This method draws the gelatin and minerals out of the bones and into the broth leaving you with a rich, flavoured liquid.

How long should broth be simmered? ›

Chicken stock can be simmered for as little as 1 hour or up to 8 hours. Most often, you'll see recipes call for somewhere in between, about 3 to 4 hours. The longer the stock simmers, the more concentrated its flavor.

Does broth get better the longer you simmer? ›

The longer you cook the broth the more concentrated it becomes. The important step to remember for food safety is that once your broth is cooked to your liking it needs to be cooled quickly and not left set on the stove for hours.

What happens if you simmer a broth for too long? ›

There's a limit to how much flavor a given ingredient will impart—past that, extra time just turns everything to mush. Big beef or lamb bones can be cooked for up to eight hours, or overnight. Chicken bones are more like four to six. Veggies give up all their flavor in about an hour.

How long should ramen sit in boiling water? ›

Boil 1 ¼-cup of water, then remove the seasoning packet and dump the noodles into the water, along with any extra ingredients. Let it boil for around three minutes, and remove it from the heat.

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