Black Bean Puree with Soft Rice | IDDSI Level 4 Recipe

IDDSI Level 4 (Pureed) | 70 minutes (plus overnight soaking) | Easy | Vegetarian

Black beans (black soybean variety) are among the most antioxidant-rich plant foods available — the dark pigment in the seed coat is predominantly anthocyanin, the same class of antioxidants found in blueberries and purple cabbage. Traditional Chinese medicine associates black beans with kidney nourishment and eye health. Beyond their cultural significance, black beans provide complete soy protein (all nine essential amino acids) and are an excellent source of folate, iron and magnesium. Blended into a smooth, deep-purple puree, they make a visually striking and nutritionally compelling main component served alongside IDDSI Level 4-compliant soft rice.

Ingredients (2–3 servings)

Black Bean Puree:

• 150g dried black soybeans (soaked overnight or for at least 8 hours)
• 2 slices fresh ginger
• 800ml water
• 1 teaspoon sesame oil
• 1 teaspoon soy sauce
• Salt to taste

Soft Rice (optional accompaniment):

• 100g white rice
• 300ml water (1:3 rice to water ratio for soft congee-style rice)

Method

Black Bean Puree:

1. Drain soaked black beans; they should have roughly doubled in size; rinse under cold water
2. Place beans in a saucepan with ginger slices and 800ml fresh water; bring to the boil over high heat and skim any foam
3. Reduce to a low simmer; cover and cook for 50–60 minutes until beans are completely soft and can be crushed effortlessly between two fingers with no resistance
4. Remove ginger slices; transfer beans and approximately 300ml of the cooking liquid to a blender (reserve remaining liquid to adjust consistency)
5. Blend on high speed for 90 seconds until completely smooth — the puree should be a deep, glossy purple
6. Pass through a fine-mesh sieve into a clean saucepan; press residue firmly with the back of a spoon to extract maximum liquid including pigments from the seed coat; discard remaining solids
7. Return to low heat; add soy sauce, sesame oil and salt; stir to combine and warm gently
8. Confirm IDDSI Level 4 texture; add small amounts of reserved cooking liquid if too stiff

Soft Rice:

• Cook white rice with water at a 1:3 ratio (rice:water) or use the congee/porridge setting on a rice cooker; the resulting soft rice should be mashable with a fork under gentle pressure

Texture Test

IDDSI Level 4 (Pureed) confirmation: Press the black bean puree lightly with a fork — it should show clear fork-tine impressions, not spring back, and not flow on its own. When combined with soft rice, the overall dish should still meet Level 4 standards — the rice grains should be sufficiently soft to mash with tongue pressure alone.

Safety Notes

⚠️ Beans must be fully cooked — undercooked black beans remain firm and present a significant choking hazard; always confirm with a finger-press test before blending. Raw or undercooked black soybeans also contain compounds that inhibit digestion.

⚠️ Remove black bean skins during sieving — the skins are thin but tough; while they contain valuable anthocyanins, they do not fully break down in the blender; sieving removes any persistent skin fragments that would compromise texture compliance.

⚠️ Distinguish black soybeans from other black beans — black soybean (黑豆 / 黑大豆, with yellow or green interior) differs from black kidney beans or turtle beans; confirm the variety at purchase, as cooking times and flavour profiles differ.

Sourcing in Hong Kong

• Dried black soybeans: Organic food stores, PARKnSHOP health food section, or Chinese herbal dried goods stalls at wet markets; choose plump, uniformly black seeds with a glossy sheen; avoid shrivelled or dull-coated beans, which indicate age

Nutrition

Approximately 190 kcal per serving of black bean puree (150g), 12g protein, 26g carbohydrate, 4g fat. Black soybeans contain all eight essential amino acids and are classified as a complete plant protein. Their anthocyanin content is linked to reduced oxidative stress, potential protection against cataracts and macular degeneration, and improved insulin sensitivity — all highly relevant health considerations for elderly care home residents. Soy isoflavones offer additional bone-protective effects for post-menopausal women.