Cloves

Cloves: History, Active Compounds and Complete Culinary Guide

Cloves are the dried, unopened flower buds of Syzygium aromaticum, a tree native to the Maluku Islands (Spice Islands) of eastern Indonesia. Their extraordinary fragrance — one of the most intense and distinctive of any spice — made them among the most valuable traded commodities of the medieval world, and the desire for direct access to cloves and other Spice Island spices was one of the primary drivers of the Age of Exploration. The Portuguese reached the Maluku Islands in 1512, and the subsequent Dutch, then British colonial control of the clove and nutmeg trade represents one of the earliest and most ruthless examples of commodity monopoly in history — the Dutch massacred the population of the Banda Islands in 1621 to control nutmeg production, an event of significant historical notoriety. Today, cloves are produced primarily in Indonesia, Madagascar, and Tanzania. The clove tree also has the distinction of producing clove oil — predominantly eugenol — which has been used in dentistry for centuries as a local anaesthetic and antiseptic; oil of cloves applied to a toothache is a folk remedy with genuine pharmacological basis.

Active Compounds and Properties

Eugenol (70–90% of clove essential oil) is a phenylpropanoid compound with demonstrated antimicrobial, antioxidant, anti-inflammatory, and local anaesthetic properties. Cloves have among the highest antioxidant activity of any spice measured by ORAC (oxygen radical absorbance capacity). A single teaspoon of ground cloves provides meaningful antioxidant activity. At culinary quantities, cloves' primary role is as a flavour compound; concentrated clove oil or high-dose supplements require caution as eugenol is hepatotoxic (liver-damaging) at high doses.

Culinary Uses of Cloves

Use sparingly — cloves are intensely flavoured and easily overwhelm a dish. Stud an onion with whole cloves for a classic French stock base. Stud a glazed Christmas ham with whole cloves before baking. Use in mulled wine, spiced cider, and warm punch. Add to rice pudding, bread sauce, and custard. Use in garam masala, biryani, and Indian spice blends. In Moroccan cooking, cloves feature in ras el hanout. In Indonesian rendang, they provide characteristic depth. Ground cloves in Christmas cake, mince pies, and spiced biscuits. One or two cloves can transform a pot of rice or a braised meat dish without the flavour being identifiable but making everything taste better.