The most reliable way to remove hazelnut skins is to roast them at 180°C (360°F) for about 13 to 15 minutes, then rub the warm nuts against a surface that creates friction. The skins crack and loosen from the heat, making them easy to flake off. If you need every last bit of skin removed, a baking soda blanch works even better, though it skips the roasted flavor.
The Roasting Method
Preheat your oven to 180°C (360°F). Spread the hazelnuts in a single layer on a rimmed baking sheet with a little room between them. Roast for 13 to 15 minutes, stirring every 5 minutes. You’ll know they’re ready when you can smell them and the skins look cracked and slightly shiny. Because the skins are already dark brown, it can be hard to tell if they’re burning, so lean toward pulling them out a bit early rather than late. Roasting at lower temperatures or shorter times (say, 5 to 10 minutes at 175°C) typically won’t loosen the skins enough to be worth the effort.
Once the nuts come out of the oven, you need to rub the skins off while they’re still warm. The classic approach is to bundle them in a clean dish towel, fold it over, and roll the nuts around with firm pressure. This works well, but it stains the towel with brown residue that’s a pain to wash out.
A cleaner alternative: rub the warm hazelnuts against a fine mesh sieve or a wire cooling rack set over a bowl or sheet pan. The metal grid catches the skins as they flake away, and cleanup is far simpler than laundering towels. The skins drop right through or collect underneath.
Expect to remove roughly 70 to 80 percent of the skin this way. Some stubborn patches will cling, especially in the crease of the nut. For most recipes, this is perfectly fine.
The Baking Soda Blanch
If you need the skins completely gone, for a smooth hazelnut butter, a pale-colored batter, or chocolate truffles where dark flecks would show, blanching in alkaline water is the way to go. The baking soda raises the pH of the water, which breaks down the bond between the skin and the nut far more effectively than plain boiling water.
Combine 1 cup of hazelnuts with 3 cups of water and ¼ cup of baking soda in a large saucepan. Bring the mixture to a boil and let it bubble for about 4 minutes. The water will turn dark brown, almost black, which is normal. Drain the nuts in a colander and rinse them under cool running water. The skins will slip off with just light rubbing between your fingers. You can do this one nut at a time under the running tap, and it goes faster than you’d expect.
The tradeoff is that you won’t get that toasted flavor. If you want both clean skins and roasted taste, blanch first, pat the nuts dry thoroughly, then roast them at the same 180°C for 8 to 10 minutes until golden.
Why the Skins Are So Stubborn
Hazelnut skins, sometimes called the pellicle, account for only about 2.5 percent of the nut’s total weight, but they cling tightly to the surface. Unlike almond skins, which slide off after a quick soak in hot water, hazelnut skins are thinner and more papery, bonded to an uneven, creased kernel. Heat causes them to dry out and crack, creating gaps where friction can catch and peel them away. The alkaline blanch works differently: it chemically weakens the bond itself, which is why it’s so much more thorough.
Storing Skinned Hazelnuts
Once you remove the skins, hazelnuts lose some of their natural protection against going rancid. The skin contains antioxidants that slow fat oxidation, and roasting accelerates that process further. Research comparing peeling methods found that roast-peeled hazelnuts developed peroxide levels (a marker of rancidity) over 8 times higher than hazelnuts peeled with gentler techniques over 12 months of storage. Roast-peeled nuts also produced nearly twice the amount of hexanal, a compound associated with stale, off flavors.
For home purposes, this means you should use skinned hazelnuts relatively quickly. Store them in an airtight container in the refrigerator for up to two weeks, or freeze them for two to three months. Avoid leaving skinned, roasted hazelnuts at room temperature for more than a few days, especially in warm weather. If you’re prepping ahead, it’s better to store them skin-on and peel them the day you need them.
Picking the Right Method
- For baking and snacking: Roast and rub with a mesh sieve. Fast, simple, and gives you toasted flavor. A few skin remnants won’t matter.
- For nut butters and smooth fillings: Baking soda blanch, then optionally roast. Gets virtually all the skin off and prevents bitter flecks in your final product.
- For praline or brittle: Roast and rub. The caramelized sugar will mask any remaining skin, and the roasted flavor is essential.
- For garnishes where appearance matters: Blanch. Clean, pale nuts look more polished on top of cakes or salads.