Egusi

Egusi seeds come from melons in the watermelon genus that are grown for their seeds rather than their bitter, pale flesh. The seeds are cream to pale tan, flat and oval, about 1 centimeter long, often with a thin edge and a plump, oily kernel. They are usually sold shelled, either whole or ground into a coarse, off-white meal. The flavor is mild, nutty and slightly sweet, and the ground seeds have a rich, oily texture. When cooked in liquid the meal clumps into soft curds and thickens the broth. Egusi is also sold roasted and as a pressed cake after oil extraction, and unshelled seeds are common in markets across West Africa.

The plants grown as egusi belong to the group of cultivated melons related to watermelon and are generally treated as Citrullus mucosospermus, a species or subspecies native to West Africa. Genetic studies suggest it is closely related to the wild ancestors of the watermelon and may have been domesticated for its seeds long before sweet dessert melons existed. The word egusi comes from the Yoruba language of Nigeria, where the seeds and the soup made from them share the name, and similar forms appear in Igbo (egwusi) and other languages of the region. Other names, such as agushi in Ghana, reflect local pronunciations.

Seed melons have been grown in West Africa for centuries, and the seeds have long been a valued protein and fat source in regions where animal protein can be scarce. Archaeological and botanical evidence shows that melons related to egusi were part of early farming systems across the Sahel and the forest belt. Egusi seeds were also traded across the region as a staple ingredient, and they travelled with enslaved Africans and later migrants to the Caribbean, Brazil and North America, where they influenced soups and stews.

In modern times egusi has become a signature of West African cuisine. Egusi soup is served at weddings, funerals, festivals and family meals, and it is exported in dried and ground form to shops in Europe and North America where African diaspora communities live. Farmers often intercrop egusi with yams, cassava or maize because the sprawling vines cover the ground and suppress weeds. Researchers have recently become interested in egusi as an underused crop with potential for protein and oil production, and national research institutes in Nigeria and elsewhere have worked on improving seed yield.

The classic use is egusi soup: ground seeds are mixed with palm oil, onions, peppers, locust beans or crayfish and leafy greens such as bitter leaf, spinach or pumpkin leaves, and simmered with meat or fish. The paste can be fried into cakes or balls, and the seeds can be toasted and eaten as a snack. Egusi oil is pressed for cooking and for soap and cosmetics in some areas. The residual cake is used in animal feed. Egusi soup is traditionally eaten with pounded yam, fufu, eba or rice.

Egusi seeds are rich in fat and protein, and they supply minerals such as magnesium, phosphorus and zinc along with vitamin E. Much of the fat is unsaturated, mainly linoleic and oleic acids. Because they are calorie-dense, they are best treated as a rich ingredient rather than a light food. Published nutritional values vary with the species and region, and clinical studies on egusi itself are limited, so claims about specific health effects should be treated cautiously.