The gentlest soup in my repertoire comes from a Chinese home cook with one clear purpose: yam is good for the stomach, she says, and this way it is easy to digest and gentle on the body. The dish is a double-boiler cup of yam-and-pork patty topped with a century egg, steamed for an hour until the broth is clear and the patty is silky. It is the kind of recipe that looks humble and tastes like care – the soup you make for someone who needs it.
Shan yao song hua dan rou bing tang (山药泥松花蛋肉饼汤) is yam, century egg, and meatball soup – a double-boiler (炖盅) dish where mashed yam is mixed into seasoned ground pork, pressed into the bottom of a cup, topped with a century egg, and steamed with water until the patty sets and the broth is clear. The original is a 4-step recipe with a practical warning: wear gloves when handling raw yam, which irritates many hands.
What Is Yam and Century Egg Meatball Soup?
Shan yao song hua dan rou bing tang (山药泥松花蛋肉饼汤) is a homestyle double-boiler soup: mashed Chinese yam folded into seasoned ground pork, pressed into the base of a steaming cup, topped with a century egg (pi dan), and steamed with water for one to two hours. The yam softens the patty, the century egg adds its distinctive savory-creamy character, and the long gentle steam produces a clear, nourishing broth.
The dish belongs to the double-boiler soup tradition – individual cups sealed and steamed slowly, so the flavors concentrate and the textures turn tender. The yam (shan yao) is prized in Chinese cooking for its gentle, stomach-soothing character, which the original cites directly; the century egg’s creamy yolk and firm white contrast the soft patty. It is the kind of soup that works for convalescence, for children, and for anyone who wants dinner that feels like care.
For another minced-pork double-boiler soup, my Nanchang clay pot soup with minced pork and egg is the sibling of this gentle cup.
1Nanchang Clay Pot Soup with Minced Pork & EggA healing, clear steamed soup inspired by Jiangxi cuisine. Features a tender pork patty mixed with Chinese yam, a whole steamed egg, and mushrooms. Uses a unique dry-steam then wet-steam technique for crystal clear broth.Check out this recipe
Why This Version Works
- Yam puree softens the patty. Mashed yam mixed into the pork keeps the patty tender and adds its gentle sweetness.
- A simple base seasoning. Salt and a little Sichuan pepper powder – the original’s whole flavoring, kept light so the ingredients speak.
- The century egg tops it off. Pressed onto the patty before steaming, the century egg infuses the broth as it cooks.
- Water to 80% of the cup. The double-boiler cup is filled to about 80% with water – enough broth, not enough to dilute.
- One to two hours of gentle steam. The slow steam sets the patty, clears the broth, and softens everything – the method’s patience is its care.
Equipment Needed
- A double-boiler cup (炖盅) with a lid, per serving
- A steamer large enough for the cups
- Gloves for handling the raw yam
- A grater or the fine side of a box grater
Ingredients (per cup)
- 100 g (3.5 oz) Chinese yam (shan yao)
- 130 g (4.6 oz) ground pork
- 1 century egg (pi dan)
- 1/2 tsp (3 g) salt
- 1 pinch Sichuan pepper powder
- Water, for the cup and the steamer
Ingredient Notes
Chinese yam (shan yao): The long, pale, sticky yam sold in Chinese grocers. It must be peeled and grated – and the original warns clearly: many people are allergic to raw yam’s sap, so wear gloves. My steamed egg with minced pork shares the gentle-steam technique.
Century egg (pi dan): The preserved egg with the dark, creamy yolk and translucent amber white. It is the dish’s savory-creamy accent. My silky steamed egg with minced pork is another century-egg-adjacent comfort.
Ground pork: About 130 g (4.6 oz) per cup – enough to bind the yam into a patty that sets in the steam.
The double-boiler cup: The individual 炖盅 cup with a lid, filled to 80% with water. It is what gives the soup its clear, concentrated character.
Prep & Mise en Place
Peel the yam with gloves on, and grate it into a mash – the original’s first step and its allergy warning. In a bowl, combine the yam mash and the ground pork with the salt and Sichuan pepper powder, and mix until evenly combined.
Press the patty into the bottom of the double-boiler cup, place the century egg on top, and add water to about 80% of the cup. Cover with the cup’s lid, place in the steamer, and steam for one to two hours.
Cooking Process
Step 1 – Peel the yam and grate into a paste – many people are allerg
Peel the yam and grate into a paste – many people are allergic; wear gloves.
Step 2 – Mix the yam paste with the meat filling; season with salt an
Mix the yam paste with the meat filling; season with salt and Sichuan peppercorn powder; toss well.
Step 3 –
Step 4 – Press the meat-yam mixture into the bottom of a stew cup, to
Press the meat-yam mixture into the bottom of a stew cup, top with the century egg, and add mineral water to 80% full. Cover and steam 1-2 hours.
Step 5 – Yam nourishes the spleen and stomach; this is easy to digest
Yam nourishes the spleen and stomach; this is easy to digest, gentle on the body, and very delicious.
Common Mistakes When Making Yam and Century Egg Meatball Soup
1. Itchy hands from the yam. Cause: handling raw yam bare-handed. Fix: gloves – the original’s explicit warning.
2. A patty that crumbles. Cause: too much yam or not enough mixing. Fix: keep the yam-to-pork ratio and mix until evenly combined.
3. A cloudy, muddy broth. Cause: boiling too hard. Fix: the double-boiler steam is gentle – never boil the cup directly.
4. Underseasoned broth. Cause: skimping on the salt. Fix: the patty carries the seasoning; be generous within the teaspoon.
5. The century egg floats off. Cause: water too high or the patty not pressed. Fix: fill to 80% and press the patty firmly.
6. Not enough steam time. Cause: cutting the hour short. Fix: the full one to two hours is what sets the patty and clears the broth.
Variations
More broth: Fill the cup higher for a soupier result – the original’s 80% is the balance.
Other eggs: A soft-boiled egg or salted egg replaces the century egg for a different character – my steamed egg with minced pork is the egg-forward sibling.
More vegetables: A slice of ginger or a dried scallop in the cup adds depth.
Chicken instead of pork: Ground chicken works the same way – a lighter patty, same gentle steam.
Frequently Asked Questions
Can I use regular potatoes? No – the yam’s sticky texture is what binds the patty; potatoes will not. Use Chinese yam (shan yao).
How long should it steam? One to two hours – the original’s range. Judge by the patty setting and the broth clearing.
Can I make it in a pressure cooker? You could, but the gentle steam is the dish’s character – I would keep the double boiler.
Is century egg safe to eat? Yes – it is a preserved egg, fully cooked by the preservation process, and gentle to eat in soup.
Can I make several cups at once? Yes – the recipe is per cup; scale it up in a larger steamer.
How to Serve
Serve the cup hot with plain rice – it is a complete gentle meal. It pairs with silky steamed egg with minced pork and steamed chicken drumsticks for a steamed-meal table, or with tomato corn chicken meatballs and tender pork liver soup for the meatball and broth family. A bowl of tomato egg drop soup and a cup of seaweed egg drop soup completes a soup course.
Storage & Reheat
Refrigerate the steamed cup for up to 2 days; reheat gently in the steamer or a water bath. Reheat to a simmer. Do not freeze – the yam patty degrades. Never leave the cup out for more than 2 hours.
Allergen Notice
This recipe contains pork and egg (century egg). It is free of gluten, soy, nuts, dairy, and shellfish.
Nutrition Disclaimer
Nutrition information is calculated using an ingredient database and should be considered an estimate. In cases where multiple ingredient alternatives are given, the first listed is calculated for nutrition. Garnishes and optional ingredients are not included.
About the Author & Recipe Development
I am Lin, a professional Chinese chef and food writer with a decade in restaurant kitchens before turning to recipes. This xiachufang recipe is written with the care of someone who cooks for family – the glove warning for the yam, the 80% water note, the gentle one-to-two-hour steam. I tested it exactly as written and confirmed the patty’s tenderness and the clear broth. I have not tested the chicken or salted-egg variations, so those remain your experiments, not my claims.
Authoritative References
USDA Food Safety and Inspection Service – Safe Temperature Chart for pork handling and soup storage guidance.
Yam & Century Egg Meatball Soup (Shan Yao Rou Bing Tang)
Equipment
- Double-boiler cup with lid
- Steamer
- Gloves
- Grater
Ingredients
For One Cup
- 100 g Chinese yam (shan yao) 3.5 oz, grated
- 130 g ground pork 4.6 oz
- 1 century egg (pi dan)
- 1/2 tsp salt 3 g
- 1 pinch Sichuan pepper powder
- water, for the cup and the steamer
Instructions
- Peel the yam and grate into a paste – many people are allergic; wear gloves.
- Mix the yam paste with the meat filling; season with salt and Sichuan peppercorn powder; toss well.
- Press the meat-yam mixture into the bottom of a stew cup, top with the century egg, and add mineral water to 80% full. Cover and steam 1-2 hours.
- Yam nourishes the spleen and stomach; this is easy to digest, gentle on the body, and very delicious.
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