What it is:

Paitan ramen is a rich, milky-white pork and chicken bone broth that's been cooked at high heat until the collagen and fat emulsify into a creamy suspension. It's the foundation of tonkotsu-style ramen. Building a proper bowl takes planning—typically a two-day process involving bone preparation, slow cooking, and multiple components.

What you need to understand

• Ratios matter: For paitan, you want roughly 40-50% collagen-rich bones (feet, trotters, skin), 30-40% flavor bones (femurs, necks), and 10-20% fat sources. Per 450ml serving, you need about 450g of bones.
• High heat is essential: Unlike clear broths, paitan requires aggressive boiling to emulsify the fat and collagen into that signature cloudy appearance.
• It's a multi-day project: Day 1 is washing and soaking bones. Day 2 is the long cook. Components like chashu and eggs should be made ahead and stored overnight.
• Components work in parallel: While bones simmer, you can make tare (seasoning base), aromatic oil, marinated eggs, and chashu. Each has its role in the final bowl.

Caveats

• You absolutely cannot rush the bone broth. Skipping the overnight soak or blanching step means murky, off-flavored broth.
• Temperature control matters. Too low and you won't get emulsification; too high wastes fuel without benefit. Keep it at a rolling boil.
• Tare is concentrated. A little goes a long way—45ml per 450ml of broth. Don't eyeball it.
• Marinating eggs and chashu overnight is non-negotiable. The flavors need time to penetrate.

Neat stuff

• The science of dashi: cold-soaking mushrooms and kombu overnight maximizes guanylate (umami) production. Then heating to 75°C activates enzymes for a second umami boost. That's neat!
• Centrifugal force for perfect eggs: stirring eggs in the first minute centers the yolk for Instagram-worthy halves. That's neat!
• Fat arithmetic: The spreadsheet shows pig feet contribute 42% of total weight but 0% usable fat—they're pure collagen. Meanwhile, pig skin adds 24% fat at only 6% of total weight. Efficiency! That's neat!

Hands on

Shopping List (4 servings)

Based on the bone ratio spreadsheet:

Bones (total: 3,600g)

• 1,800g (50%): Collagen sources - pig feet, chicken feet, pig skin
• 1,440g (40%): Flavor bones - pig/chicken femurs, neck bones, tail
• 360g (10%): Fat sources - fatback, pork belly offcuts

Proteins

• 1,500g pork belly (for chashu, yields ~300g cooked)

Dry Goods

• Japanese shoyu (soy sauce) - imported, not local substitutes
• Ramen noodles - 150-200g per person
• Kombu (dried kelp)
• Dried shiitake mushrooms
• Nori sheets - 2 per bowl

Fresh

• 4 eggs
• Spring onions (green parts for chashu, white parts for oil)
• Ginger
• Neutral cooking oil (canola, grapeseed)

Pantry

• Rice vinegar
• Brown sugar

Bone Broth (Paitan) - Two Days

Day 1: Preparation

1. Rinse bones thoroughly under cold running water
2. Place in large container, cover with cold water
3. Refrigerate overnight

Day 2: The Cook

1. Drain soaking water, rinse bones again
2. Blanch: Boil bones for 5-10 minutes, discard water
3. Optional but recommended: Roast bones at 200°C for 30 minutes (save any fond/residue)
4. Place bones in stock pot, cover with fresh water
5. Bring to aggressive boil and maintain for 6-24 hours
   • Important: High heat with lots of bubbles creates the milky emulsion
   • Top up water as needed to keep bones covered
   • Skim only if excessive scum forms
6. Cool overnight in refrigerator

Tare (Seasoning Base)

Dashi Liquid:

300ml water
20g kombu
20g dried shiitake mushrooms

1. Cold-soak mushrooms and kombu in water overnight in fridge (maximizes guanylate)
2. Next day: Heat slowly to 75°C, hold for 10 minutes (enzyme activation)
3. Bring briefly to boil, remove from heat (locks in umami)
4. Strain solids

Final Tare: Combine dashi liquid with:

100ml Japanese shoyu
10g brown sugar
10ml rice vinegar

Store in fridge. Use 45ml per bowl.

Chashu (Pork Belly) - Make Day Before

1. Wash ~200g pork belly per person
2. Roll tightly, tie with kitchen twine
3. Sear all sides in hot pan
4. In pot, combine (1:1:1 ratio):
   • Soy sauce
   • Rice vinegar
   • Water
   • Green parts of spring onions
   • Sliced ginger
   • 1 tbsp brown sugar
5. Add pork, bring to boil
6. Cover with vented lid (or foil with holes)
7. Simmer 1-2 hours, turning every 30 minutes
8. Cool in liquid, refrigerate overnight

Ramen Eggs (Ajitsuke Tamago) - Make Day Before

Cooking:

1. Bring water to rolling boil (add 1 tbsp vinegar)
2. Gently lower room-temperature eggs into water
3. Stir gently in circular motion for first minute (centers yolks)
4. Cook exactly 6 minutes 30 seconds
5. Immediately transfer to ice bath for 10+ minutes
6. Peel carefully

Marinade:

60ml soy sauce
60ml water or chicken stock
2 tbsp rice vinegar
2 tbsp brown sugar or honey
Optional: 1 slice ginger, 1 garlic clove

1. Combine marinade ingredients, cool completely
2. Place peeled eggs in ziplock bag with marinade
3. Squeeze out air, seal
4. Refrigerate 12-24 hours (no longer or texture suffers)

Aromatic Oil

½ cup neutral oil
1 bunch spring onions (white parts), cut in 2-inch pieces
1-inch ginger, sliced into coins
Optional: dried chili

1. Place everything in small saucepan (cold)
2. Heat on medium-low to gentle sizzle
3. Cook 10-15 minutes until scallions are deep golden (not black)
4. Strain into jar
5. Save crispy scallions for topping

Assembly (Per Bowl)

1. Heat bowl (very important—run under hot water)
2. Add 45ml tare to hot bowl
3. Add 450ml piping hot broth
4. Add cooked ramen noodles (150-200g dried weight)
5. Top with:
   • Sliced chashu (50-80g cooked weight)
   • Half a marinated egg
   • 1 tbsp aromatic oil
   • 2 nori sheets
   • Sliced spring onions
   • Optional: crispy scallions from oil

The Ratios (From the Spreadsheet)

For 4 servings using the bone calculator:

Category	Ingredients	Raw Weight	% of Total	Cooked Yield	% of Yield
Gelatin	Pig feet	1,750g	41.8%	1,000g	29.1%
Gelatin	Chicken feet	847g	20.2%	847g	24.7%
Fat	Pig skin + fat	234g	5.6%	234g	6.8%
Bones	Pig tail	427g	10.2%	427g	12.4%
Bones	Chicken carcass	926g	22.1%	926g	27.0%
Total		4,184g	100%	3,434g	100%

Key Insight: Pig feet lose 43% of their weight during cooking (water and impurities), while other bones remain relatively stable. Plan accordingly when scaling recipes.

Next Steps

• Source quality Japanese shoyu from Asian markets (MixMarkt, Go Asia, Japaner Glockenbach in Munich)
• Visit Viktualienmarkt for fresh bones from butchers who know their cuts
• Experiment with bone ratios—some prefer more chicken for lighter broth, more pork for richness
• Try toppings: menma (fermented bamboo), kikurage (wood ear mushrooms), corn, butter
• Read about shio (salt) and miso tare variations once you master shoyu