Hazelnut

The hazelnut is the edible nut of hazel trees, which belong to the genus Corylus. Several species and cultivated varieties are grown for their nuts, with the European hazel, Corylus avellana, being particularly important in commercial production. Hazelnuts develop inside a leafy husk that surrounds the nut as it matures. When ripe, the hard outer shell protects the edible kernel.

Hazel trees are naturally found across parts of Europe and Asia and have been cultivated for their nuts for thousands of years. They grow well in temperate climates and are commonly planted in orchards. Turkey, Italy, the United States, and other countries are major producers, although production varies from year to year depending on weather conditions.

Hazelnuts are valued for their nutritional content and their many culinary uses. They contain mainly unsaturated fats, as well as plant protein, dietary fiber, vitamin E, magnesium, copper, manganese, and other nutrients. They can be eaten raw or roasted and are widely used in desserts, spreads, chocolate products, pastries, and cereals. Hazelnut oil is also used in cooking and in some cosmetic products.

Like other tree nuts, hazelnuts can cause allergic reactions in sensitive people, sometimes even in small amounts. From a botanical point of view, the hazelnut is a true nut because its mature fruit has a hard shell surrounding the seed. The familiar kernel inside is therefore the seed that people eat. Its combination of energy, nutrients, distinctive flavor, and versatility has made the hazelnut an important food in many cultures.