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Level 3 Moderately Thick
Prep: 120 min Difficulty: Medium Main ingredient: fish-maw
#level-3#fish-maw#collagen#soup#cantonese#hong-kong#liquidised#elderly#lao-huo-tang#tcm

Fish Maw Soup (Strained) | IDDSI Level 3 Recipe

IDDSI Level 3 (Liquidised) | 120 minutes | Moderate

Fish maw soup (花膠湯, fa giu tong) is one of the most prized tonics in Cantonese culinary tradition. Fish maw — the dried swim bladder of large fish such as croaker or cusk — is treasured for its exceptionally high collagen content, delicate neutral flavour, and the silky, gelatinous texture it imparts to a slow-cooked broth. In Hong Kong, 花膠湯 is a hallmark of special occasion cooking: served at wedding banquets, given as a gift to new mothers postpartum, and prepared for elderly family members during convalescence. The dried fish maw must first be rehydrated over many hours before simmering, which releases abundant collagen peptides into the liquid. For individuals on IDDSI Level 3 Liquidised diets, the rehydrated fish maw pieces — despite their gelatinous texture — remain a swallowing hazard and must be removed entirely. This adaptation simmers the rehydrated fish maw with lean pork and ginger, then strains the broth completely to deliver all the collagen richness and savoury depth of the traditional dish in a safe, particle-free flowing liquid.

Ingredients (3–4 servings)

Method

  1. Rehydrate fish maw: Soak dried fish maw in cold water for 8–12 hours (overnight preferred), fully submerged with a small plate to keep it below the surface. Drain, rinse, and cut into rough chunks — do not worry about appearance as all solids will be discarded.
  2. Blanch lean pork in boiling water for 3 minutes, drain, and rinse away foam.
  3. Combine blanched pork, rehydrated fish maw chunks, stoned red dates, ginger slices, and 1 litre of cold water in a heavy saucepan or clay pot. Bring to the boil over high heat, skimming foam.
  4. Add Shaoxing wine if using. Reduce to a gentle simmer, cover, and cook over low heat for 90–100 minutes. Add wolfberries in the final 10 minutes.
  5. Remove from heat. Season with salt. Allow to cool 5 minutes.
  6. Pour all contents through a fine-mesh sieve into a clean saucepan. Discard all solids — fish maw pieces, pork, red date remnants, wolfberry skins, ginger. The broth must be completely particle-free.
  7. If any collagen gel or small particles remain, strain a second time through muslin or a fine cloth.
  8. The resulting broth will be slightly viscous and silky — this is normal collagen content and does not affect IDDSI Level 3 compliance provided it flows freely from a tilted spoon.
  9. Serve warm at 50–60°C.

Texture Test

IDDSI Level 3 (Liquidised) confirmation: The finished broth may have a slightly viscous, silky consistency due to dissolved collagen. Tilt a loaded spoon — liquid should flow slowly and continuously, leaving a light coating on the back of the spoon. Using the IDDSI syringe test at 45 degrees, 1–10ml should be expelled over 10 seconds. Confirm there are no fish maw fragments, fibres, or gelatinous lumps in the strained liquid.

Viscosity note: The collagen-rich broth may thicken slightly on cooling. If it gels on refrigeration (a sign of high collagen), reheat gently and confirm it returns to a free-flowing liquid before serving.

Safety Notes

⚠️ All fish maw pieces must be removed — rehydrated fish maw, despite its soft appearance, is a gelatinous solid (IDDSI Level 6 at minimum) and poses an aspiration risk if swallowed whole by individuals with dysphagia. Complete straining is not optional.

⚠️ Gelling on cooling is normal — high-collagen broth may set to a soft gel when refrigerated. This does not indicate a problem; reheat to above 55°C to reliquefy before serving.

⚠️ Serving temperature — confirm below 60°C before serving. Reduced oral sensation in dysphagia patients increases scalding risk.

⚠️ Fish maw quality — purchase from reputable dried seafood suppliers (海味舖). Avoid overly bleached or chemically processed fish maw; choose golden-yellow, dry, odour-neutral pieces.

Sourcing Outside Hong Kong

For international care kitchens and home cooks outside Hong Kong, Cantonese ingredients are widely available at East and Southeast Asian grocery stores:

Fish maw (花膠 / 魚鰾): specialist Chinese dried seafood shops; Wing Yip and See Woo (UK), dried seafood sections at H Mart and T&T (US/CA).

If a specific ingredient is unavailable in your region, the recipe notes alternative substitutions in the Ingredients section. For dishes requiring fresh Cantonese-specific ingredients (e.g. preserved century egg, fresh rice noodle rolls), check with your local East Asian grocer before substituting — texture compliance for IDDSI levels may require specific products.

Nutrition

Approximately 45–65 kcal per serving (200ml strained broth), with an unusually high level of dissolved collagen peptides (gelatin) — estimated 3–6g per 200ml depending on fish maw grade and simmering duration. Collagen hydrolysate provides glycine and proline, amino acids important for skin integrity, joint health, and gut lining — especially relevant for elderly individuals with pressure injury risk or post-surgical recovery. The broth is naturally low in fat after straining, mild in sodium if salt is used conservatively, and exceptionally well-tolerated by individuals with reduced appetite.

Cultural Note

花膠湯 occupies a position of prestige in Cantonese cuisine that few ingredients match. Fish maw has been traded along China’s southern coast for centuries, and its association with wealth, health restoration, and filial care is deeply ingrained in Hong Kong culture. Serving an elderly parent or grandparent a bowl of 花膠湯 is an act of respect and love — a declaration that their wellbeing warrants the finest ingredients and the most patient cooking. By straining the broth to a safe IDDSI Level 3 consistency, this tradition of care can continue for individuals with dysphagia, preserving the emotional and cultural meaning of the dish even when its original texture must be modified.

⚠️ This recipe is for reference only. Texture varies by technique and ingredients. A speech therapist should confirm the appropriate IDDSI level.
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