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Hot and Sour Kelp Shreds (酸辣海带丝) — Home-style recipe hero image
Home-styleEasy 20 min serves 3 Vegetarian-ok Vegan

Hot and Sour Kelp Shreds (酸辣海带丝)

酸辣海带丝 · suan la hai dai si

家庭快手版 · Home version: Family version uses pre-cut salted kelp from the Asian grocer and dresses it cold. Restaurant versions blanch fresh kelp to order and add a spoonful of fried peanut crunch on top.

This is the plate of cold kelp that arrives almost free at northern Chinese dumpling houses while you wait for your order — sharp with vinegar, hot with chili oil, impossibly moreish. Making it at home costs pennies and keeps for three days in the fridge, which is why it has become the default 'we need one more vegetable dish' answer in our house.

H

Recipe author: HǎoWèi Test Kitchen

Home-cooking research team

Reviewed by HǎoWèi editorial team · Last updated 2026-08-29

Quick & EasyVegetarianParty & Sharing

Ingredients

  • dried or salted kelp shreds干 / 盐渍海带丝🏮 asian60 g dried
  • carrot, cut into fine shreds胡萝卜(切细丝)🛒 local60 g
  • garlic cloves, minced大蒜(剁蓉)🛒 local3 cloves
  • dried chilies, snipped干辣椒(剪段)🏮 asian3 pieces
  • chili oil辣椒油🏮 asian1 tbsp
  • chinkiang vinegar镇江香醋🏮 asian1 1/2 tbsp
  • light soy sauce生抽🏮 asian1 tbsp
  • sugar白糖🛒 local1 tsp
  • sesame oil香油🏮 asian1 tsp
  • toasted sesame seeds熟白芝麻🏮 asian1 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

  1. 1Soak dried kelp in cold water for 30 minutes (or rinse salted kelp three times). It will expand to roughly four times its dry volume.

    🔍 Look for 30 min

    Visual: kelp dark green, fully unfurled and flexible

    You know it's right when: no longer stiff or curled

  2. 2Bring a pot of water to a rolling boil and blanch the kelp for 3 minutes. This softens the fibre and removes any seaweed funk.

    🔍 Look for High heat 3 min

    Visual: kelp turns brighter green and softens

    You know it's right when: bends easily without snapping

  3. 3Drain and rinse under cold running water for 30 seconds to stop the cooking, then squeeze out as much water as you can.

    🔍 Look for 30 sec

    Visual: kelp cool to the touch

    You know it's right when: no water drips when squeezed

  4. 4Cut the kelp into 6 cm lengths and pile it in a bowl with the carrot shreds and minced garlic.

    🔍 Look for 2 min

    Visual: even 6 cm shreds mixed with orange carrot

    You know it's right when: prep complete

  5. 5Heat 1 tbsp oil in a small pan over medium heat, add the snipped dried chilies and fry for 20 seconds until they darken and smell toasty. Pour the hot chili oil directly over the garlic in the bowl.

    🔍 Look for Medium heat 20 sec

    Visual: chilies dark red, oil shimmering

    You know it's right when: garlic sizzles when oil hits

  6. 6Add chinkiang vinegar, light soy sauce, sugar and sesame oil. Toss thoroughly, rest 10 minutes, then taste — it should hit sour first, then salty, then hot. Sprinkle sesame seeds and serve cold or at room temperature.

    🔍 Look for 10 min

    Visual: shreds glossy and evenly coated

    You know it's right when: flavours balanced after resting

Tips

  • · Squeeze the kelp dry after blanching — watery kelp dilutes the dressing.
  • · Pouring hot oil over raw garlic is what gives the dish its aroma; do not skip it.
  • · Chinkiang vinegar is essential. Rice vinegar is too mild and the dish falls flat.
  • · It tastes better after 30 minutes in the fridge, so make it ahead.

Sources & references

Quantities, technique notes, and substitution ratios are cross-checked against established Chinese cookery references and standard food-science sources.

Common questions

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

Why do you cook the aromatics (garlic/ginger) first on low heat?

Aromatics contain oils and sugars that turn bitter if scorched. Gentle heat (low-medium) lets garlic and ginger release their fragrance without browning too fast. If the pan is too hot, garlic goes bitter within seconds — that's why we always add aromatics first, before the main ingredients.

Source: Chinese Cooking Demystified technique library

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