Photo by jackmac34 on Pixabay (Pixabay License)

hazelnuts

Nuts & SeedsHazelnuts are harvested in autumn (September–October in the Northern Hemisphere), with the fresh crop available through winter and into early spring; processed and stored forms are available year-round.

Hazelnuts are rich in monounsaturated fats, vitamin E, and copper, with a notable content of antioxidants and fiber. They provide approximately 630 calories per 100 grams and support cardiovascular health.

About

Hazelnuts are the edible fruits of Corylus avellana, a deciduous shrub native to southeastern Europe and western Asia, though now cultivated extensively in Turkey, Italy, Oregon, and other temperate regions. The hard-shelled drupe grows within a leafy involucre and produces a kernel rich in oil and distinctive flavor. The nuts are roughly spherical with a thin, hard brown shell containing a creamy, pale kernel. Their flavor profile is warm, slightly sweet, and subtly earthy, with an oily richness that develops further with roasting. Major commercial varieties include Barcelona, Negra, and Tonda Romana, which differ in size, shell thickness, and flavor intensity.

Hazelnuts are available both in-shell and blanched, with the latter category including roasted and raw preparations. The blanching process removes the papery skin that covers the kernel.

Culinary Uses

Hazelnuts are prized in both sweet and savory applications across European, particularly Italian and Turkish, cuisines. They are ground into hazelnut butter and paste, used extensively in chocolate confections, pralines, and gianduja, and incorporated into biscuits, cakes, and desserts. Hazelnuts also feature in savory contexts: roasted and chopped as garnishes for vegetables and salads, ground into dukkah and other spice blends, and used to prepare hazelnut oils for dressings and finishing. In Italian cuisine, hazelnuts are essential to Piedmont's pastry traditions, while Turkish and Eastern European cooking employs them in both sweet and spiced savory preparations. Roasting intensifies flavor and is recommended before grinding or incorporating into recipes.

Forms & Preparations

In-shell — Whole nuts with intact hard shell; require cracking and sometimes blanching; used for roasting fresh or as decorative elements.
Blanched kernels (raw) — Shell and papery skin removed, pale white kernels; ready for grinding into paste or butter, or for use in baking.
Roasted kernels — Blanched and roasted to deepened color and enhanced flavor; used directly as garnish, ground into flour, or incorporated into confections.
Hazelnut butter/paste — Ground roasted kernels with or without added oil; smooth or chunky consistency; used in desserts, spreads, and sauces.
Hazelnut oil — Cold-pressed or expeller-pressed oil from kernels; amber-colored with concentrated hazelnut flavor; used for finishing dishes, dressings, and drizzling.
Hazelnut flour/powder — Finely ground roasted kernels with most oil removed; used in baking, confectionery, and as thickening or binding agent in sauces.

Substitutes

Unknown — Use in equal amounts as a direct substitute in most sweet applications; almonds have a milder, more delicate flavor and slightly less oil content, so increase liquid slightly in dough-based recipes.
Unknown — Substitute at a 1:1 ratio in baked goods and savory dishes; walnuts impart a more robust, astringent character and work best where that earthiness complements other flavors.
Unknown — Use at a 1:1 ratio for ultra-rich, buttery applications such as pralines and nut butters; more expensive and higher in fat, so reduce added oils slightly.
Unknown — A budget-friendly substitute at 1:1 ratio in applications like dukkah and ground nut toppings; flavor is more assertive and legume-based, less subtle than hazelnuts.
Unknown — Use as a 1:1 replacement for hazelnut butter in sandwiches and baking when allergies are a concern; milder, slightly less rich flavor profile.