Longan and Red Date Sweet Soup (Liquidised) | IDDSI Level 3 Recipe

IDDSI Level 3 (Liquidised) | 25 minutes | Easy

Longan and red date sweet soup (龍眼紅棗糖水, lung yin hung jou tong seui) is one of the most beloved Cantonese tong sui — a gently simmered restorative dessert soup built around dried longan flesh (gui yuan rou), red jujube dates, and rock sugar. The combination is prized in Cantonese wellness culture for its reputed blood-nourishing and calming properties, and it appears year-round on Hong Kong dessert shop menus and in domestic kitchens alike. Traditional versions retain whole longan flesh and date skin, placing them firmly outside the safe range for IDDSI Level 3 Liquidised diets. This adaptation simmers the fruit fully, then strains the liquid completely, yielding a clear, particle-free golden sweet soup that meets Level 3 requirements while carrying the full aromatic character of the original.

Ingredients (2–3 servings)

• 30g dried longan flesh / gui yuan rou (or 60g fresh shelled and stoned longan)
• 8 dried red dates / jujubes (stoned; rinse well before use)
• 800ml water
• 40–60g rock sugar (adjust to taste)
• 2 slices fresh ginger (optional; adds gentle warmth and reduces any fruit mustiness)
• 1 tsp dried goji berries (optional; adds sweetness — must be fully strained out in the sieving step)

Method

1. Rinse dried longan flesh and stoned red dates under cold water to remove surface dust and any debris. Confirm all date stones have been removed. Slice ginger if using.
2. Combine all ingredients (longan, dates, ginger, goji berries if using) with 800ml of water in a medium saucepan. Bring to the boil over high heat.
3. Reduce heat to low; cover and simmer for 20–25 minutes until the soup is deep golden, fragrant, and the longan flesh and dates are completely soft and have released their flavour into the liquid.
4. Add rock sugar and stir until fully dissolved.
5. Pour the entire contents through a fine-mesh sieve into a clean saucepan. Discard all solids — longan flesh, date skin and flesh, ginger slices, goji berries. No solid material should remain in the final liquid.
6. Return the strained sweet soup to low heat to keep warm.
7. Taste and adjust sweetness if needed. Confirm consistency: the liquid should flow slowly from a tilted spoon with no particles visible.
8. Serve warm. May also be chilled and served cold — confirm absence of solids again before serving cold, as sediment can sometimes settle.

Texture Test

IDDSI Level 3 (Liquidised) confirmation: Tilt a loaded spoon — the soup should flow slowly and continuously, leaving a thin, glossy coating on the back of the spoon. Using the standard IDDSI syringe test, 1–10ml should be expelled over 10 seconds at 45 degrees. The liquid must be completely clear of fruit flesh, skin, fibre, or any particulate matter.

Particle-free confirmation: Rub a small amount between clean fingertips — there should be no gritty or fibrous sensation whatsoever. If any texture is detected, pass the liquid through the sieve a second time using a finer mesh or muslin cloth.

Safety Notes

⚠️ All solids must be fully removed — longan flesh and date skin qualify as Level 7 solid foods even when thoroughly cooked. Even small fibrous fragments pose a choking risk for individuals on Level 3 Liquidised diets. Complete straining is non-negotiable.

⚠️ Verify date stones before cooking — some red dates retain small residual stone fragments. Inspect each date before adding to the pot, and confirm the sieve catches any hard material during straining.

⚠️ Serving temperature — confirm the soup is below 60°C before serving. Excessively hot liquids increase scalding risk, which is compounded in individuals with reduced oral sensation often associated with dysphagia.

Sourcing in Hong Kong

• Dried longan flesh (gui yuan rou): Wet market dried goods stalls and Chinese herbalists; choose amber-coloured, plump pieces with a sweet aroma; avoid very dark or musty-smelling batches
• Stoned red dates: Supermarkets and Chinese herbalists; large, thick-fleshed Xinjiang red dates are preferred; pre-stoned versions improve safety at source
• Rock sugar: Supermarket condiment aisles; traditional yellow crystal rock sugar (老冰糖) is recommended for its mellow, round sweetness that complements longan and date

Nutrition

Approximately 90 kcal per serving (200ml), 23g carbohydrate. The strained liquid retains water-soluble nutrients from longan and red dates including potassium, B vitamins, and vitamin C. Longan is traditionally considered blood-nourishing in Cantonese wellness practice and contains meaningful iron and folate. Red dates contribute polysaccharides and antioxidants. For elderly individuals with poor appetite, this warm, subtly sweet soup provides accessible energy and micronutrients in a format that typically elicits good compliance.

Cultural Note

Longan and red date sweet soup occupies a special place in Cantonese wellness culture, commonly prescribed in the postpartum period, served at auspicious celebrations, and prepared as an everyday autumn and winter restorative in Hong Kong households. Its association with vitality and good fortune makes it emotionally significant for elderly residents. Presenting a Level 3-compliant version in care settings allows individuals with dysphagia to continue participating in this shared cultural and familial practice — a meaningful act of dignity and inclusion in the dining experience.