Bolu hazelnut candy is a hard candy unique to Bolu province, made by coating whole hazelnuts with sugar. Produced in Bolu since the 1920s, the product attracts both local and foreign visitors and contributes to the regional economy. It was registered with a protected geographical indication on September 22, 2020, and its geographical indication protection is governed under the Industrial Property Law No. 6769.

Distinctive Features

The production of Bolu hazelnut candy uses hazelnuts sourced from the provinces of Ordu and Giresun, along with small-sized hazelnuts grown locally in Bolu, commonly known as “mountain hazelnuts” (Corylus Colurna L.). At least 95% of the product consists of whole hazelnuts. The average fat content of the hazelnuts is around 60%, which directly affects the flavor and taste characteristics. Mastery in the production process is critical. The final product is glossy, hazelnut-shaped, and white in color.

Preparation

Bolu hazelnut candy is made from hazelnut kernels, white granulated sugar, wheat starch, and water. It contains no additives, flavors, or flavoring agents. The production process involves the following steps:

1. Hazelnut Selection and Preparation: Intact hazelnut kernels are selected. They are oven-dried at non-roasting temperatures to remove moisture, and brown inner shells are separated. Only the white inner part of the sieved hazelnuts is used.
2. Syrup Preparation: Sugar and water are mixed in a 4:1 ratio and boiled. The prepared hot syrup is kept ready for production.
3. Coating Process: Hazelnut kernels are added to a heated pan, followed by hot syrup and a small amount of wheat starch. Mixing ensures the hazelnuts are coated with sugar. This process is repeated until the desired sugar thickness is achieved (approximately 4–5 hours).
4. Cooling and Packaging: After coating, the product is cooled and immediately packaged to minimize contact with air. It should be stored in clean, dry, and shaded areas.

The recommended consumption period is up to 2 months from the production date and 1 week after opening the package.

Geographical Boundaries and Production Conditions

The product’s reputation, traditional production method, and requirement for skill are closely associated with Bolu province. Therefore, all production stages must take place within Bolu’s borders.

Control

Inspections are conducted at least once a year under the coordination of the Bolu Chamber of Commerce and Industry. The inspection authority consists of representatives from the Bolu Chamber of Commerce and Industry, Bolu Provincial Directorate of Agriculture and Forestry, Bolu Provincial Health Directorate, and Bolu Municipality. Inspections check compliance with the ingredient list, production methods, and geographical indication usage. Non-compliance is reported to the relevant person or institution, and additional inspections may be carried out if necessary.