Hazelnuts, also known as filberts, are small, round nuts with a smooth, hard shell. They have a rich, buttery flavor and a slightly sweet taste. Hazelnuts are often enjoyed roasted and eaten as a snack or used as an ingredient in both sweet and savory dishes. They are commonly found in desserts like chocolates, pastries, and spreads like Nutella. Hazelnuts are also used to make nut butter and can be added to salads, granola, and baked goods for added crunch and flavor. Rich in healthy fats, protein, and vitamins, hazelnuts are a nutritious addition to any diet.