Sweet Corn and Chinese Yam Soup

Main Ingredients

• Sweet corn (fruit corn) 1 cob (net kernels approx. 150g)
• Chinese yam (Dioscorea opposita, peeled net weight) 150g
• Egg 1 piece
• Goji berries 5-8g (about 10-15 pieces)
• Rock sugar (or yellow rock sugar) 15-25g
• Cornstarch slurry (cornstarch + water) 10g cornstarch + 20ml water
• Water Approx. 800-1000ml

Steps

1. Corn: Rinse the corn cob. Use a knife to cut off the kernels close to the cob, or break the cob in half and cut vertically. Try to keep the germ part intact. Yam: Wear gloves (yam mucus can irritate skin). Peel the Chinese yam and cut into 1 cm cubes. Immediately place the diced yam in lightly salted water to prevent oxidation and browning.

   

2. Place about 2/3 of the corn kernels (approx. 100g) into a blender or food processor. Add about 200ml of water and blend on high speed for 1-2 minutes until smooth. Reserve the remaining 1/3 of the kernels whole to add texture to the soup. For an ultra-smooth texture, blend all the corn; however, keeping a few whole kernels adds a nice pop of juice.

   

3. Add the remaining water (approx. 600-800ml) to a pot and bring to a boil. Add the diced yam and cook for 5-8 minutes until the yam softens and the edges become translucent. Pour in the corn puree and the reserved whole corn kernels. Bring to a boil over medium heat, then reduce to medium-low heat and simmer for 3-5 minutes, stirring occasionally to prevent sticking.

   

4. Add rock sugar and stir until fully dissolved. Slowly drizzle in the cornstarch slurry while stirring rapidly in one direction with a ladle to evenly thicken the soup. Once the soup becomes translucent and slightly thick, turn the heat to the lowest setting.

   

5. Beat the egg until smooth. Keeping the soup at a gentle simmer, slowly drizzle the egg liquid in a thin stream into the pot while stirring rapidly in circular motions with chopsticks or a spoon. This creates thin, feathery egg flowers (cloud-like egg drops). Turn off the heat and sprinkle in the goji berries.

   

6. Ladle the soup into bowls, garnish with a few extra goji berries or corn kernels, and serve warm.

   

TCM Notes

Lutein and zeaxanthin in corn are the primary pigments of the macular region of the retina. They effectively filter blue light, provide antioxidant protection, and prevent age-related macular degeneration. Mucilage protein in yam (a mucopolysaccharide-protein complex) protects the gastric mucosa, and yam polysaccharides exhibit antioxidant and immunomodulatory activities. Traditional Chinese Medicine Perspective: Corn: Sweet, neutral, channels to the Stomach and Large Intestine. Strengthens the spleen, promotes appetite, promotes diuresis, and harmonizes the stomach. Helps with poor appetite, indigestion, and edema caused by spleen-stomach weakness. Chinese yam: Sweet, neutral, channels to the Spleen, Lung, and Kidney. Strengthens the spleen and nourishes the stomach, promotes salivation and moistens the lungs, and consolidates kidney essence. Beneficial for poor appetite due to spleen deficiency, chronic diarrhea, lung deficiency cough, and nocturnal emissions. Modern Nutrition Research: Spleen and stomach care: Mucilage protein forms a protective film over the gastric wall, while corn fiber gently promotes digestion without irritation. Eye protection: Lutein and zeaxanthin are natural "eye gold" that protect the retina and prevent vision decline. Moisturizing and dryness relief: The soup's hydrating nature, combined with yam's saliva-promoting effects, effectively relieves dry mouth and throat in autumn and winter. Immunity boost: Yam polysaccharides enhance macrophage function, while B vitamins in corn support energy metabolism and disease resistance. Blood sugar management: Despite containing carbs, the rich dietary fiber slows sugar absorption (GI ≈ 55-60). Moderate consumption does not cause sharp blood sugar spikes

Suitable for：Those with spleen-stomach weakness, poor appetite, and indigestion Those with dry cough without phlegm and dry mouth/throat during autumn dryness Those with eye fatigue and prolonged screen time (computer/phone users) Those recovering from illness needing gentle nourishment Middle-aged and older adults (stomach care, eye protection, anti-aging) Children (nutritious, naturally sweet, and easy to accept) Vegetarians (can omit the egg for a fully vegan version) Generally suitable for most people as a daily wellness soup

Not suitable for：Diabetics: Although the GI is moderate (approx. 55-60), the thickening agent (cornstarch) accelerates sugar absorption. Use no rock sugar, strictly limit portion size (no more than one small bowl, approx. 150ml), and reduce concurrent carbohydrate intake. Those with severe constipation (hard, dry stools): Yam has astringent properties and mainly contains soluble fiber, which may worsen severe constipation — consume sparingly. Those with food stagnation, bloating, and sour burps: Both corn and yam have tonic properties; avoid during acute food stagnation. Those allergic to corn or Chinese yam (rare) Infants under 6 months old: Digestive system is not fully developed; not recommended.