Cordyceps Stewed Duck: Traditional Chinese Medicinal Soup

Introduction to Medicinal Diet

Cordyceps sinensis (Chinese caterpillar fungus) stewed with old duck is a classic nourishing medicinal dish originating from the Lingnan region. With a long history, it is highly esteemed by gourmets and health enthusiasts alike. This medicinal dish features the precious Chinese medicinal herb Cordyceps sinensis as the key ingredient, paired with rich, nutrient-dense old duck. Through gentle slow-simmering, the active constituents of Cordyceps sinensis are fully infused into the broth, resulting in a dish that retains the savory flavor of duck while embodying the warming, moistening nature of the herb.

Cordyceps sinensis (Berk.) Sacc. (Dongchongxiacao, Chinese caterpillar fungus), also known as cordyceps, is a unique combination of insect and fungus. Since ancient times, it has been listed as one of the “nine immortal herbs.” According to the *Supplement to the Compendium of Materia Medica* (*Bencao Gangmu Shiyi*), cordyceps can “supplement essence and boost qi, strengthen yang and benefit the kidneys.” Old duck (aged duck) has a sweet and cool nature (甘凉), enters the Lung (LU), Stomach (ST), and Kidney (KI) meridians, and is known to nourish yin and nurture the stomach, as well as promote urination to reduce edema. Combining these two ingredients not only produces a rich, mellow flavor but also creates a nourishing tonic that embodies the TCM principle of “homology of medicine and food” (药食同源). It is especially suitable for restorative consumption during autumn and winter, or for recuperating the body after illness when one is in a weakened, deficient state.

This medicinal cuisine is not only a nourishing soup on everyday family tables but also frequently appears in high-end banquets and rehabilitation diets. Its rich aroma and warm, smooth texture make it a classic medicinal cuisine representative suitable for people of all ages.

Efficacy of Medicinal Diet

Stewed old duck with Cordyceps sinensis (Cordyceps) combines the dual benefits of food and medicinals, producing significant effects in tonifying the Lung and Kidney, nourishing Yin and moistening Dryness, and enhancing immune function. The bioactive constituents in Cordyceps, such as cordycepin and cordycepic acid, effectively regulate the body’s immune system, improving its ability to resist disease while also aiding in the repair of lung tissue, relieving chronic cough, asthma, and other respiratory disorders.

The main ingredient, old duck, is rich in high-quality protein, B vitamins, and trace elements such as iron and zinc, and effectively nourishes yin and clears heat, as well as tonifies blood and improves complexion. During the slow-cooking process, the fat and protein of the duck merge with the fat-soluble components of Cordyceps sinensis (Chinese caterpillar fungus), making the medicinal effects more easily absorbed by the body. When consumed regularly in appropriate amounts, it can help alleviate symptoms such as general deficiency and fatigue, soreness and weakness of the lower back and knees, and frequent urination at night. It also provides supportive benefits for delaying aging and improving sleep quality.

Additionally, this medicinal diet has excellent lung-moistening and cough-relieving effects, significantly alleviating dry cough with scant sputum and throat dryness caused by autumn dryness. The collagen and various amino acids in the broth work together to nourish the skin, maintaining its elasticity and luster. It is a comprehensive tonic medicinal diet that balances internal regulation with external nourishment.

The Role of Traditional Chinese Medicine

Tonify the Lung and Benefit the Kidney, receive Qi and calm panting.

From the perspective of Traditional Chinese Medicine, Cordyceps sinensis (Dongchongxiacao) enters the Lung and Kidney channels. It is neutral in nature and sweet in taste, with the effects of tonifying the Lung and Kidney, arresting bleeding, and transforming phlegm. According to TCM theory, the Lung governs qi and controls respiration, while the Kidney governs the reception of qi. When both the Lung and Kidney are deficient, the body may experience symptoms such as shortness of breath, dyspnea, and a weak cough. Cordyceps sinensis and old duck soup makes use of the property of Cordyceps sinensis to enter the Lung and Kidney channels, combined with the action of old duck to nourish yin and downbear fire. This effectively supplements the yin of the Lung and Kidney, stabilizes Kidney qi, and thereby improves the function of the respiratory system.

Nourish Yin, moisten dryness, and harmonize Yin and Yang.

In TCM theory, old duck is regarded as an excellent yin-nourishing ingredient, particularly suitable for individuals with yin deficiency constitution. Yin deficiency often manifests as dry mouth and tongue, five-palm heat (heat in the palms, soles, and chest), and night sweats. Although Cordyceps sinensis (winter worm summer grass) leans towards warm supplementation, when paired with old duck, it becomes warm without being drying, and tonifying without being greasy, effectively harmonizing the balance of yin and yang in the body. This combination embodies the TCM medication wisdom of “tonifying without causing stagnation, nourishing without causing greasiness,” ensuring that the health benefits of the medicinal diet are stable and long-lasting.

Indications

This medicinal diet is particularly suitable for middle-aged and elderly individuals, especially those experiencing decline in Lung and Kidney (LU-KI) function due to aging, presenting with soreness and weakness of the lower back and knees, and lack of vitality. Cordyceps sinensis (Cordyceps) tonifies the Kidneys, effectively alleviating common age-related symptoms such as frequent nocturia, tinnitus, and dizziness. Meanwhile, the Yin-nourishing effect of old duck helps improve sleep quality compromised by Yin deficiency.

In addition, office workers under chronic stress, individuals who regularly stay up late, and those with a smoking habit are also highly suitable for consumption. Such groups often present with Lung Yin deficiency pattern and compromised immune function. Cordyceps sinensis stewed with old duck can help repair lung damage, enhance the body’s resistance to fatigue, and alleviate chronic throat discomfort caused by smoking or air pollution. For patients in the recovery phase after illness, those with post-surgical weakness, and postpartum women requiring constitutional regulation after weaning, this medicinal dietary dish can also serve as an adjunctive recuperative food therapy option.

Contraindicated Populations

Although Cordyceps sinensis stewed with old duck has numerous benefits, it is not suitable for everyone. Pregnant women and those during menstruation should use it with caution, as Cordyceps sinensis has a certain blood-activating effect that may affect fetal stability or menstrual bleeding volume; it is recommended to decide whether to consume it under a doctor’s guidance. Infants and preschool children are also not advised to take it, as their zang-fu organ functions are not yet fully developed, and blind supplementation may lead to precocious puberty or endocrine disorders.

People with common cold with fever, cough with copious thick yellow phlegm should avoid consumption. At this stage, the body is under invasion by external pathogenic factors, and overly nourishing foods may “shut the door on the pathogen,” preventing its smooth expulsion and instead aggravating the condition. Additionally, those with severe hypertension, acute gout flare-ups, as well as individuals with Spleen and Stomach deficiency and frequent diarrhea, should also consume with caution. Although old duck is cool in nature, excessive intake may increase the gastrointestinal burden in those with Spleen and Stomach deficiency-cold, leading to indigestion or abdominal distension.

Ingredient Formula Ratio

The following formula is a classic standard ratio, suitable for consumption by 3 to 4 people.

Cordyceps sinensis (Cordyceps): 5g to 8g (It is recommended to select high-quality wild Cordyceps or high-altitude imitation wild Cordyceps.)

Old duck: 1 whole (approximately 1500g to 1800g; it is recommended to choose an old duck of two years or older, as the meat is firmer and the soup flavor is richer)

Zingiber officinale (ginger): 15 g (approximately 3 to 4 slices), used to eliminate fishy odor and disperse cold.

Scallion segments: 10g (approx. 2 stalks), to enhance aroma.

Cooking wine: 15 ml, used for blanching to remove fishy odor.

Salt: 3 to 5 grams (adjust to personal taste during final seasoning)

Plain water: 2000 ml to 2500 ml

According to individual constitution and needs, moderately add 10g of Lycium barbarum (goji berry) or 5 jujubes (Ziziphus jujuba) to enhance the effect of supplementing blood and calming the spirit.

Preparation Method

Step 1: Prepare the ingredients.

Slaughter the old duck, remove the feathers and internal organs, and rinse thoroughly with clean water, paying special attention to removing the duck’s lungs and the lymphatic tissue on both sides of the tail (commonly known as “duck musk”). Gently rinse the surface dust off Cordyceps sinensis (Dong Chong Xia Cao) with running cold water; avoid excessive soaking to prevent loss of active ingredients. Slice ginger and cut scallions into sections, set aside.

Step two: Blanch to remove fishy odor.

Place the cleaned whole old duck into cold water, add cooking wine and two slices of ginger, then bring to a boil over high heat. After boiling, continue to cook for 3–5 minutes, skimming off any foam and fat with a spoon during this time. Remove the duck and rinse off any residual foam on the surface with warm water, then drain well and set aside. This step effectively removes the fishy odor and excess fat from the duck, resulting in a clearer broth.

Step 3: Simmer in the pot

Place the blanched whole old duck into a stew pot (a clay pot or ceramic casserole is recommended). Evenly stuff the Cordyceps sinensis (winter worm summer grass) into the duck’s cavity, or simply add them directly into the pot. Add the remaining ginger slices and scallion segments, then pour in enough clean water to fully submerge the duck. Bring to a boil over high heat, then immediately reduce to low heat and simmer slowly.

Step 4: Simmer over low heat

Maintain a gentle simmer for 2.5 to 3 hours. During this time, avoid opening the lid too frequently to prevent the loss of aroma. After about 1.5 hours of simmering, use a spoon to gently skim off any excess oil from the surface, resulting in a clearer soup. When the duck meat can be easily pierced with chopsticks, the cooking is done.

Step five: Season and remove from the pot.

5 minutes before turning off the heat, add goji berries (Lycium barbarum fruit) or jujube dates (Ziziphus jujuba fruit) if used, then season with salt. Do not add salt too early, otherwise it will cause the proteins in the duck meat to coagulate prematurely, affecting the texture. Once the flavor is adjusted, it is ready to be served and enjoyed. When eating, you can take out the Cordyceps sinensis (Chinese caterpillar fungus) from the duck’s belly and consume it together with the duck meat.

Drinking Tips

1. It is recommended to take the decoction on an empty stomach or half an hour before meals, as this allows for more complete absorption of its nutrients. One small bowl in the morning and one in the evening is ideal, but excessive consumption should be avoided. The total daily intake should be limited to 300 to 400 milliliters. Those with a weakened constitution may appropriately increase the amount to 500 milliliters.

2. The active constituents of *Cordyceps sinensis* (Cordyceps) are gradually released during prolonged high-temperature simmering. However, if the simmering time exceeds 4 hours, certain heat-sensitive bioactive compounds may be degraded. Therefore, it is recommended to control the simmering time between 2.5 and 3 hours to achieve an optimal balance between therapeutic efficacy and palatability. If using an electric slow cooker, the “slow simmer” mode can be selected.

3. The remaining broth and duck meat can be refrigerated for 2 to 3 days. When reheating for consumption, ensure it is brought to a full boil to guarantee food safety. Avoid reheating multiple times, as each reheating causes nutrient loss. For long-term storage, portion the broth into containers and freeze; it can be kept for about one month.

4. For individuals trying Cordyceps (Ophiocordyceps sinensis) for the first time, it is recommended to start with a smaller dosage (e.g., 3 grams) to observe whether the body adapts, then gradually increase to the standard dosage. If any adverse reactions occur, discontinue use immediately and consult a professional physician.