Hazelnut Au Chocolat

This is a classic European-style flourless chocolate cake built on a foundation of melted chocolate, butter, and ground hazelnuts (often called filberts). No flour, no leavener beyond whipped egg whites, which means the structure lives or dies on technique.

The yolks get beaten to a pale ribbon, then tempered into the warm chocolate so they thicken without scrambling. Folding in the whipped whites at the very end keeps the batter airy enough to rise gently while it bakes low and slow.

The long, gentle bake is what separates this from a standard chocolate cake. A slow oven pulls moisture out evenly, giving you a cake that’s set on top but still fudgy and truffle-like inside. Serve thin slices with a ribbon of raspberry sauce, the sharp fruit cuts through the richness beautifully.

Chef Tips

• Toast the hazelnuts before grinding to deepen the flavor, and rub off the skins in a clean towel while still warm.
• Bring the eggs to room temperature, cold whites won’t whip to full volume.
• Temper carefully: drizzle a little warm chocolate into the yolks while whisking before combining, or you’ll end up with sweet scrambled eggs.
• The cake will look slightly soft in the center when done, it firms up completely as it cools.
• Run a thin knife around the springform before releasing to avoid tearing the delicate edge.

Variations

• Swap the hazelnuts for toasted almonds for a classic torte caprese profile.
• Add a tablespoon of Frangelico or dark rum with the vanilla for a grown-up finish.
• Dust with cocoa and serve with lightly whipped cream instead of raspberry sauce.