The word "ganache" first appeared in French culinary writing in the mid-nineteenth century, though the preparation itself — cream cooked with chocolate — was known earlier. The story most often told: an apprentice accidentally spilled cream into chocolate and was called a "ganache" (a fool or clumsy person) by his master. The master then tasted the result and discovered something worth keeping. Like most culinary origin stories, this is almost certainly invented. What is certain is that ganache became the foundation of French chocolate work — the filling of truffles and bonbons, the glazing layer of gâteau Opéra, the centre of a chocolate tart — and its ratio determines everything about what it becomes.
Ganache is an emulsion — cocoa butter (from the chocolate) and water (from the cream) forced into a stable suspension by the emulsifying proteins in the cream and the lecithin in the chocolate. It is the same physical phenomenon as mayonnaise (oil and water emulsified by lecithin in egg yolk) applied to chocolate. The ratio of cream to chocolate determines the texture at every temperature: - **Soft ganache (2:1 cream to dark chocolate by weight):** Pourable at room temperature, soft set when cold. Used for filling tarts, saucing, truffle centres in the softest style. - **Medium ganache (1:1 cream to dark chocolate):** Sets to a scoopable consistency at room temperature, firm when cold. The most versatile — truffle centres, filling bonbons, glazing. - **Firm ganache (1:2 cream to dark chocolate):** Sets hard at room temperature. Used for moulded bonbons that must hold their shape after unmoulding, for cutting into squares, for layering in gâteau. These ratios shift with chocolate type: milk chocolate contains more sugar and dairy fat, requiring less cream for the same consistency; white chocolate contains no cocoa solids and more sugar, requiring far less cream. A 1:1 ganache with dark chocolate becomes a 3:1 cream-to-white chocolate ganache for equivalent texture.
1. The emulsion builds from the centre — pour hot cream into the centre of chopped chocolate and allow to melt for 30 seconds before stirring. Begin stirring from the centre outward in tight circles, expanding gradually. This method (the "Hermé method") produces a stable emulsion from the first movement. 2. Do not stir too aggressively — ganache incorporates air if over-agitated, producing a grainy, bubbly texture on the surface of moulded bonbons 3. Crystallisation matters — ganache allowed to crystallise slowly at room temperature (24 hours) has a smoother, more stable texture than ganache refrigerated immediately. Refrigeration accelerates crystallisation unevenly. 4. Addition of butter at 35–40°C (after emulsion is established) produces "ganache au beurre" — smoother, silkier, with a lower melting point and higher gloss Sensory tests: - **The emulsion check:** A correctly emulsified ganache is glossy, smooth, and uniform in colour — no visible separation of cream and chocolate. If you see a greasy, separated surface, the emulsion has broken. Gentle warming and patient re-stirring can sometimes recover it. - **Texture at temperature:** A ganache at room temperature (20°C) should hold a peak when a spoon is dragged through it — not a sharp peak, but a soft mound that gradually relaxes. If it flows immediately flat, it is too soft. If it holds rigidly, it is too firm. - **The snap of a firm ganache:** A correctly made firm ganache, cut with a hot knife at 4°C, should snap cleanly at the edge — not crumble, not smear. The snap is the sound of a correctly crystallised fat structure.
French Pastry Deep: Creams, Entremets, Sugar Work & Viennoiserie