Durum Wheat

Durum is a tetraploid wheat, a grass that grows about one metre tall and carries a spike of long, bristly awns around closely packed grains. The kernels are large, hard, glassy and amber, noticeably harder than the grain of common bread wheat, and the endosperm is dense and yellow thanks to natural carotenoid pigments.

Because the grain is so hard it is not milled to soft flour in the usual way. Instead it is cracked and sifted into semolina, a coarse granular meal with a golden colour and a mild, slightly nutty, sweet flavour. Finer durum flour is also sold, along with whole durum grain, bulgur and freekeh-style products. The gluten of durum is strong but less elastic than bread wheat, which suits pasta that must hold its shape in boiling water.

Durum belongs to the tetraploid wheats and is descended from domesticated emmer, itself a product of early farming in the Fertile Crescent of the Near East around ten thousand years ago. Over time farmers selected free-threshing forms with hard grain, and these spread around the Mediterranean basin, where the crop is especially well suited to hot, dry summers and mild winters.

The name comes from the Latin durus, meaning hard, a reference to the grain. The specific and varietal names reflect this: durum is simply the Latin word for hard. In English, the wheat is also called macaroni wheat after its main modern use, and the name semolina comes from the Italian semolino, a diminutive of semola, which itself goes back to the Latin simila meaning fine wheat flour.

Hard wheats were among the staple grains of the ancient Mediterranean and North Africa, and early forms of durum are believed to have been grown around the eastern Mediterranean and the Nile region for millennia. In North Africa, couscous made from semolina became a defining food of the Berber peoples and later of the wider Maghreb, while the Middle East developed bulgur and a range of flatbreads from hard wheat.

In Italy, dried pasta made from durum became a major food from the medieval period onward, particularly in Sicily and southern Italy, where hot dry climates favoured both growing the grain and drying the noodles in the sun. The hard grain suited long storage and export, and dried pasta travelled widely as a trade good. By the nineteenth century Italian emigrants and Russian Mennonite farmers had helped carry durum production to the Americas, and in the twentieth century the Great Plains of North America, notably Saskatchewan and North Dakota, became major producing regions.

Today durum accounts for a small share of global wheat output compared with bread wheat but is concentrated in the Mediterranean, Canada, the United States, Turkey and parts of India. Crop conservation bodies such as the Crop Trust highlight its genetic diversity and its importance for food security in dry regions.

Durum semolina is the traditional raw material for dried pasta, fresh egg-free pasta shapes, gnocchi alla romana, couscous and many southern Italian breads such as pane di Altamura. Its firmness holds up well in cooking, giving the familiar al dente bite. Whole-grain durum and cracked durum are used in bulgur-style dishes, porridges, salads and soups.

Outside the kitchen, durum bran and by-products are fed to livestock. Semolina is also used in desserts such as the Middle Eastern basbousa and Indian halwa, and in some baking as a dusting to prevent sticking. Choose durum products labelled whole grain for the fullest fibre and micronutrient content.

Durum is a source of complex carbohydrate, protein, B vitamins and minerals such as iron, magnesium and selenium, especially in its whole-grain form. Pasta made from durum tends to have a lower glycaemic response than many other refined starches, partly because of its dense protein-starch structure, which is one reason it features in many balanced eating patterns.

Refined semolina has lost much of the bran and germ, and so supplies less fibre than whole durum. Whole-grain wheat foods are associated in population studies with better heart and digestive health, but those are associations rather than guarantees. Durum also provides carotenoids that give its colour.