HK Milk Tea (Thickened to IDDSI Level 2)

IDDSI Level 2 (Mildly Thick) | 15 minutes | Medium

Hong Kong milk tea (港式奶茶, gong sik naai cha) — known colloquially as “silk stocking milk tea” after the cotton sock filter used in its traditional preparation — is one of the defining cultural institutions of Hong Kong daily life. Listed as an Intangible Cultural Heritage of Hong Kong in 2017, it is made by brewing strong Ceylon tea then combining it with evaporated milk and sweetened condensed milk to produce a rich, aromatic, creamy drink that appears on virtually every cha chaan teng breakfast table. For elderly residents with dysphagia, however, standard milk tea is IDDSI Level 0 (thin liquid) and carries a meaningful aspiration risk. This adaptation thickens HK milk tea to IDDSI Level 2 (Mildly Thick) using xanthan gum — preserving the tea’s flavour, aroma and sweetness while making it safe to swallow.

Ingredients (1 serving)

• 8g Ceylon black tea leaves (or 2–3 strong black tea bags such as Lipton Yellow Label)
• 180ml freshly boiled water
• 60ml evaporated milk (Carnation or equivalent)
• 1 tablespoon sweetened condensed milk (approximately 20g, adjust to taste)
• Approximately 0.3–0.5g xanthan gum (see notes below)
• 10ml hot water (for dissolving the xanthan gum)

Method

1. Brew the tea in freshly boiled water for 4–5 minutes — the tea should be strong, as the milk will dilute its intensity. Remove the tea bags or strain out the leaves.
2. While hot, add the evaporated milk and condensed milk; stir until thoroughly combined. Taste and adjust sweetness.
3. Measure out the xanthan gum (start at 0.3g — see safety notes on precision). Mix it into 10ml of hot water and stir vigorously until fully dissolved (xanthan gum tends to clump; dissolving it in a small amount of water first prevents lumps).
4. Pour the dissolved xanthan gum solution into the milk tea; stir briskly for 30–45 seconds to distribute evenly.
5. Allow to stand for 3–5 minutes to allow the thickening to fully develop. Test flow using a 10ml syringe (see Texture Test).
6. If too thin, add a small additional amount of xanthan gum solution (increase by 0.1g increments) and retest. If too thick, add a small amount of warm milk tea to thin.
7. Once confirmed at Level 2, serve in a cup with a wide-bore straw (5–6mm diameter).

Texture Test

IDDSI Level 2 (Mildly Thick) confirmation: Draw up the thickened milk tea in a 10ml needleless syringe — flow within 10 seconds should be between 1 and 4ml. Poured from a teaspoon, the liquid should flow noticeably more slowly than water and leave a thin coating on the back of the spoon. The milk tea should NOT flow freely through a standard thin straw (internal diameter under 3mm).

Flavour and appearance check: The tea flavour and aroma should be fully preserved after thickening. Xanthan gum is tasteless and should not alter the flavour profile. If a gummy or off-taste is detected, the xanthan gum may not have been fully dissolved or the quantity was too high.

Safety Notes

⚠️ Precision matters with xanthan gum — xanthan gum is extremely potent in small quantities (0.3–0.5g is approximately 1/8 to 1/6 of a teaspoon). Small errors in measurement produce significant texture changes. Use a precision kitchen scale accurate to 0.1g. Pre-measured commercial thickener sachets (such as SimplyThick Nectar or Resource ThickenUp) are a practical alternative — follow the product’s Level 2 dosing instructions.

⚠️ Temperature affects viscosity — xanthan gum thickens more at lower temperatures; test texture at the actual serving temperature (approximately 40–50°C), not while the drink is still very hot.

⚠️ Caffeine considerations — Ceylon black tea contains caffeine (approximately 50–80mg per cup). Some medications common in elderly residents (warfarin, certain antihypertensives) may interact with caffeine. Consult the resident’s healthcare team if in doubt; decaffeinated black tea may be substituted without significantly affecting texture.

⚠️ Test every preparation — the strength of the brewed tea, the brand of evaporated milk, and the precise water temperature all affect the final viscosity. Re-test with the syringe method each time the drink is prepared.

Sourcing in Hong Kong

• Ceylon black tea: Cha chaan teng suppliers offer professional-grade loose-leaf Ceylon tea; for home use, Lipton Yellow Label tea bags (available at all PARKnSHOP and Wellcome stores) are a widely accepted substitute; CTC-type fine-leaf tea produces the most consistent extraction
• Evaporated milk: Carnation evaporated milk (full-fat, tinned) is the cha chaan teng standard; available at all major supermarkets
• Xanthan gum / commercial thickener: Pharmacies and some health-food sections of larger supermarkets carry xanthan gum; pre-portioned commercial thickeners (SimplyThick, Resource ThickenUp) are available at medical supply retailers and some hospital pharmacies in Hong Kong

Nutrition

Approximately 160 kcal per serving, 4g protein, 7g fat, 22g carbohydrate. Evaporated milk contributes calcium and vitamin D (some brands are fortified), supporting bone health. Condensed milk is high in sugar — residents with diabetes should substitute unsweetened evaporated milk and reduce the sweetened condensed milk accordingly. The xanthan gum itself contributes negligible calories. Black tea provides polyphenol antioxidants; however, tannins in strong tea may reduce iron absorption if consumed alongside iron-containing foods or supplements.

Cultural Note

Hong Kong milk tea carries a weight of cultural significance that extends far beyond its ingredients. The traditional method — repeatedly pouring strong Ceylon tea through a cotton “silk stocking” filter to achieve a perfectly smooth, frothy, layered drink — is a craft skill passed down through generations of cha chaan teng proprietors and recognised as part of Hong Kong’s living cultural heritage. For elderly residents, particularly those who grew up with a cup of milk tea as the anchoring ritual of every morning, being denied this simple pleasure because of dysphagia represents a real loss of identity and comfort. This IDDSI Level 2 adaptation preserves the essential experience — the aroma, the warmth, the sweetness, the taste of tea and milk in balance — in a form that can be safely swallowed, restoring a measure of morning dignity and continuity to residents whose swallowing function has changed.