
Seaweed Egg Drop Soup (紫菜蛋花汤)
紫菜蛋花汤 · zi cai dan hua tang
Seaweed egg drop soup (紫菜蛋花汤) is the most common Chinese home soup — light, umami-rich, and ready in minutes. It is the soup every Chinese grandmother makes when someone is feeling under the weather. The trick is swirling the beaten egg into simmering broth to create delicate ribbons, not curds.
Recipe author: HǎoWèi Test Kitchen
Home-cooking research team
Reviewed by HǎoWèi editorial team · Last updated 2026-08-29
Ingredients
- dried seaweed (zicai / laver sheets)干紫菜🏮 asian5 g
- eggs, beaten鸡蛋,打散🛒 local2 large
- toasted sesame oil香油🏮 asian1 tsp
- light soy sauce生抽🏮 asian1/2 tsp
- scallion, finely chopped (garnish)葱花(装饰)🛒 local1 stalk
- hot water or chicken broth热水或鸡汤🛒 local500 ml
- salt盐🛒 local1/2 tsp
- white pepper白胡椒粉🏮 asian1/4 tsp
🌶️ Adjust to your taste
Pick a level and we'll show exactly how much to change — no more "适量".
Spice level
Saltiness
Oiliness
Make it vegetarian
Instructions
1Rehydrate the dried seaweed in a bowl of warm water for 2-3 minutes. Drain and tear into bite-sized pieces if needed.
🔍 Look for 2-3 分钟 · 2-3 minutesVisual: 紫菜变软膨胀,呈深绿色Seaweed softens and expands, turning dark green
You know it's right when: 紫菜柔韧不脆硬Seaweed is pliable, not brittle
2Bring water or broth to a rolling boil in a pot. Season with soy sauce, salt, and white pepper.
🔍 Look for High heat 2-3 分钟 · 2-3 minutesVisual: 高汤剧烈沸腾,大泡翻滚Broth is at a vigorous boil with large bubbles breaking the surface
You know it's right when: 汤面翻滚,蒸汽充足Surface is agitated and steaming heavily
3Add the drained seaweed to the boiling broth. Cook for 30 seconds — seaweed only needs to heat through.
🔍 Look for 30 秒 · 30 secondsVisual: 紫菜在汤中漂浮翻卷,释放海味香气Seaweed floats and swirls in the broth, releasing ocean aroma
You know it's right when: 紫菜温热柔软Seaweed is warm and pliable
4Reduce heat to medium-low so the broth is just simmering. Slowly drizzle the beaten eggs in a thin stream while gently stirring in one direction.
🔍 Look for Medium-low 20-30 秒 · 20-30 secondsVisual: 蛋液形成细长的丝状蛋花,如云朵般漂浮Eggs form long, delicate ribbons and clouds in the broth
You know it's right when: 蛋花刚凝固,仍光亮嫩滑Eggs are just set but still glossy and tender
5Immediately remove from heat. Drizzle with sesame oil, garnish with chopped scallions. Serve hot.
🔍 Look forVisual: 香油浮面泛光,葱花翠绿,蛋花漂浮Sesame oil glistens on the surface, scallions bright green, egg ribbons floating
You know it's right when: 立即食用——蛋花久煮会变老Eat immediately — egg ribbons will overcook if left on heat
Tips
- · Do not boil after adding eggs — the residual heat will finish cooking them. Over-boiling makes eggs rubbery.
- · Use the hottest broth possible when adding eggs for the fluffiest ribbons.
- · Dried seaweed sheets (laver) are available in Asian supermarkets in the dried goods aisle. One sheet per person is plenty.
- · For a richer version, use homemade chicken stock instead of water.
Sources & references
Quantities, technique notes, and substitution ratios are cross-checked against established Chinese cookery references and standard food-science sources.
- Read our editorial policy
- Fuchsia Dunlop, Land of Plenty: A Treasury of Authentic Sichuan Cooking
- USDA FoodData Central — ingredient nutrition and portion data
- Traditional Chinese family-kitchen practice and regional taste records
Common questions
Can I reduce the salt/soy in this recipe?
Yes — soy sauce is the main sodium source. Use light soy at 2/3 amount and finish with salt only to taste. Rinse canned/doubanjiang components if possible. Note: reducing soy also reduces color; a drop of dark soy or a pinch of sugar can restore depth without salt.
Source: HǎoWèi diet guide
Is there a vegan substitute for oyster sauce?
Yes — 'mushroom oyster sauce' (often labeled vegetarian/vegan) is sold in most Asian grocers and increasingly in mainstream supermarkets. It behaves 1:1 and adds the same glossy umami. Watch labels if you're also gluten-free; most brands are GF, some aren't.
Source: HǎoWèi substitution engine
What's the difference between light and dark soy sauce?
Light soy (生抽) is the everyday salty seasoning — thin and salty, used in most recipes. Dark soy (老抽) is thicker, darker, slightly sweet, and used mostly for color (braises, fried rice). If you only buy one, get light soy. For dark soy's color: 1 tbsp light soy + a pinch of sugar + a few drops of molasses.
Source: HǎoWèi pantry guide
Ingredient swaps
Can't find an Asian-market staple? Use these.
Swap: toasted sesame oil
→ toasted sesame oil (same thing!)
Ratio: 1:1 · Check the label: use toasted (dark), not raw.
Swap: light soy sauce
→ regular soy sauce
Ratio: 1:1 · Slightly saltier — dial salt back by a pinch.
Swap: white pepper
→ black pepper (use ¾ amount)
Ratio: 3:4 · Sharper, but works in a pinch.
Don't make these mistakes
The traps every home cook hits — and how to avoid them.
✗ Skipping the 'rest' step — dressing runs watery.
✓ Fix: Let dressed vegetables sit 5-10 min so flavors marry.
✗ Eggs scrambled over high heat for too long — dry and rubbery.
✓ Fix: Pull eggs off while still glossy; carry-over heat finishes them.
Ways to change it up
One dish, three moods.
- Add tomato for a saucy version
- Scramble with scallion whites for extra fragrance
- Serve over rice for a complete 10-minute meal
🥢 Ask HǎoWèi
Questions about technique, ingredients, substitutions, and flavor — answered from our verified cooking knowledge base.
What to serve with it
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