Century Egg and Silken Tofu | IDDSI Level 4 No-Cook Cold Dish

IDDSI Level 4 (Pureed) | 10 minutes | Easy | No cooking required

Century egg and silken tofu (皮蛋豆腐) is one of the most recognisable cold dishes in Hong Kong’s everyday food culture — served at cha chaan teng (茶餐廳) counters, ordered at Cantonese restaurants, and prepared at home with almost no effort. In its standard form, sliced century egg is arranged atop silken tofu and dressed with sesame oil and soy sauce. For the IDDSI Level 4 adaptation, the century egg is mashed to a smooth, uniform paste rather than sliced — eliminating any discrete chunks that would require chewing — while the silken tofu beneath remains naturally at Level 4, yielding immediately under the lightest spoon pressure. The result is a dish that requires no cooking, takes ten minutes to prepare, and tastes exactly as the elderly resident remembers it: that distinctive, complex savoury flavour of century egg against the quiet creaminess of cold tofu, brought together by fragrant sesame oil.

Ingredients (4 servings)

Main:

• 600g silken tofu (盒裝嫩豆腐), preferably Japanese-style extra-soft silken tofu
• 2 century eggs (皮蛋), ideally soft-yolk variety (溏心皮蛋)

Dressing:

• 2 tablespoons light soy sauce
• 1 teaspoon sesame oil
• 1/4 teaspoon sugar
• 1/2 teaspoon fresh ginger paste (optional)
• 1 teaspoon spring onion oil or neutral cooking oil (optional, for fragrance)

Garnish (optional, Level 5+ only):

• A small amount of finely shredded young ginger, softened in warm water

Method

1. Remove the silken tofu from its packaging. Trim any irregular edges. Gently pat the surface dry with kitchen paper to remove excess moisture.
2. Peel the century eggs. Using a spoon, mash each egg thoroughly into a smooth, fine paste. The soft-yolk centre (溏心) will be semi-liquid and helps achieve a smoother result; the firm outer egg white should be mashed until no distinct chunks remain. Ensure the paste is completely uniform — this is the critical texture step for Level 4 compliance.
3. Place the silken tofu in a serving dish. Using a spoon, press it gently to an even thickness. A brief gentle stir can even out the texture, but do not over-work it into a liquid.
4. Spread the mashed century egg paste evenly over the surface of the tofu.
5. Combine the light soy sauce, sugar, and ginger paste (if using) in a small bowl; stir to dissolve the sugar. Drizzle evenly over the dish.
6. Finish with sesame oil and spring onion oil (if using). Serve immediately.
7. For a chilled summer version: refrigerate the assembled dish for 15–30 minutes before serving. The cold temperature makes the tofu firmer at the surface while remaining Level 4 underneath.

Texture Test

Fork pressure test: Passes Level 4 — silken tofu yields immediately and flows slowly under the lightest spoon pressure. Properly mashed century egg paste is smooth and uniform, with no detectable solid chunks or fibrous pieces. The two elements combined produce a consistently Level 4 pureed texture throughout the dish.

Pre-service check: Before serving, run a spoon through the century egg paste to confirm there are no intact pieces of egg white or other firmer elements. Any remaining solid pieces must be mashed further or removed.

Safety Notes

⚠️ Century egg must be fully mashed — sliced or roughly chopped century egg sits at approximately Level 5–6 and does not meet Level 4. The egg must be mashed to a completely smooth paste with no identifiable solid pieces before applying to the tofu. This is a non-negotiable step for Level 4 compliance.

⚠️ Lead content — some traditionally produced century eggs contain trace amounts of lead. For residents with impaired renal function or other conditions requiring strict heavy metal management, select lead-free century eggs (無鉛皮蛋), which are available at major supermarket chains; check product labelling. Limit frequency of consumption as a precautionary measure.

⚠️ Shredded ginger garnish — raw shredded ginger is firm and fibrous, generally Level 6–7, and is not suitable for Level 4. If garnish is desired, omit the ginger entirely or use only for residents confirmed at Level 5 or above.

⚠️ Cold food sensitivity — some elderly residents may find cold food difficult to manage or uncomfortable due to reduced oral sensitivity or cold intolerance. Allow the dish to reach room temperature before serving if preferred, or use a slightly warmed dressing.

Sourcing in Hong Kong

• Silken tofu: PARKnSHOP and Wellcome stock packaged silken tofu in the refrigerated section; look for products labelled “extra-soft” (特嫩) or Japanese-style (日式) for the finest texture
• Soft-yolk century eggs (溏心皮蛋): Available at supermarket egg sections and wet market stalls; the soft-yolk variety has a semi-liquid, gel-like centre that mashes more easily to a smooth paste than fully set century eggs
• Lead-free century eggs (無鉛皮蛋): Available at selected PARKnSHOP stores and specialty food retailers; worth seeking out for elderly residents with renal conditions

Nutrition

Approximately 110 kcal per serving (about 160g), 9g protein, 7g fat. Silken tofu is rich in plant-based protein, calcium and isoflavones; century egg provides complete protein and vitamin B12. The dish is low in calories and moderate in protein density, suitable as a light starter or side dish. Tofu’s high water content contributes to daily fluid intake, which elderly residents with dysphagia often struggle to maintain. Paired with congee or soft rice, this forms a light, complete summer meal.

Cultural Note

Century egg and silken tofu occupies a particular position in Hong Kong’s collective food memory — it is a dish encountered at almost every stage of life, from childhood family dinners to restaurant meals to quick lunches at the local cha chaan teng. The combination of century egg’s pungent, complex flavour with the quiet neutrality of silken tofu is one of the more distinctive taste experiences in Cantonese cuisine: the bold paired with the gentle, the dark amber of the egg against the white of the tofu. For elderly residents with dysphagia, the adapted version — mashed rather than sliced — does not compromise this experience. The flavour is identical. The cultural connection is intact. The dish simply becomes safe.