How Vietnam's cơm độn turned wartime scarcity into a lasting tradition

Vietnam's rich food culture has long relied on more than just white rice to feed its people. During tough economic times, many households turned to cơm độn—rice mixed with other ingredients—to make meals stretch further. What began as a necessity has since become a lasting part of the country's culinary and medicinal traditions.

From the 1950s to 1986, Vietnam's centralised economy made white rice scarce for most families. To cope, people blended rice with cheaper ingredients like sweet potatoes, manioc, maize, or coix seeds. This practice created dishes such as cơm độn khoai lang, a mix of rice and sweet potatoes that remains a reminder of those difficult years.

Not all aspects of cơm độn were negative. The mix provided a wider range of carbohydrates and, in some cases, health benefits. Green bananas, for example, were often cooked with rice, offering resistant starch that aided digestion. Coix seeds, another common addition, held a place in traditional medicine, often appearing in remedies for fatigue—including chicken soups. One such remedy, thuốc bắc tản gà (Chicken Dispersal Powder), dates back to the 14th century. Developed by imperial physician Tuệ Tĩnh during the Trần dynasty, it included coix seeds alongside other herbs like Atractylodes and Poria. The formula was widely used to treat weakness and exhaustion. Today, the cost of sweet potatoes has risen above that of white rice, marking a shift in how these foods are viewed. Survivors of the late 1970s and early 1980s, who once relied on cơm độn, now have greater access to food. White rice and mixed-rice dishes are no longer just survival meals but choices in a diverse diet.

The legacy of cơm độn lives on in Vietnam's food and medicine. Once a way to stretch limited resources, it now reflects both hardship and ingenuity. The dishes and remedies that emerged from those times continue to shape the country's traditions, even as food access improves.