Classic Chocolate Ganache: Ratios, Flavours, and Techniques
Ganache is the backbone of professional chocolate making. It fills truffles, glazes cakes, forms the base of chocolate mousse, and transforms into a silky fondue. Despite its luxurious reputation, ganache requires just two ingredients — chocolate and cream — and an understanding of ratios. Get the ratio right, and ganache behaves exactly as you need it to; get it wrong, and you'll end up with a sauce that won't set or a block you can't pipe.
Understanding Ganache Ratios
The fundamental ratio determines whether ganache is pourable, pipeable, or firm enough to roll into truffles. For a soft, pourable glaze use a 1:1 ratio of cream to dark chocolate by weight (1:1.5 for milk chocolate, as its lower cocoa content makes it less firm). For a medium ganache suitable for filling tarts or layering cakes, use 1:2 cream to chocolate. For truffle centres that need to hold a shape when rolled, aim for 1:3. White chocolate absorbs cream differently — use roughly half the cream you'd use for dark chocolate for equivalent firmness. Always weigh your ingredients; volume measurements vary too much to be reliable at these ratios.
Infusing Flavours into Ganache
Ganache takes on flavours beautifully through infusion. Heat your cream with aromatics — split vanilla pods, lemon zest, dried chilli flakes, fresh rosemary, or crushed cardamom — and let it steep off the heat for 15 to 20 minutes before straining. Reheat and pour over finely chopped chocolate. For boozy ganaches, add liqueur at the end once the mixture has cooled to around 40°C; adding it too early causes alcohol to evaporate and can break the emulsion. Nut butters, instant espresso, or fruit purées can be blended in after emulsification, but reduce the cream slightly to compensate for extra liquid.
Achieving a Perfect Emulsion
Ganache is an emulsion — fat droplets (cocoa butter) suspended in a water-based liquid (cream). To build a stable emulsion, add your hot cream to the chocolate in three stages, stirring from the centre outward in small circles. This technique, borrowed from classic French pâtisserie, prevents the mixture from becoming greasy or split. If your ganache does split and looks oily, warm it gently to 35°C and use a hand blender to re-emulsify. Adding a tablespoon of warm cream while blending usually rescues it completely. Let finished ganache crystallise at room temperature rather than rushing it in the refrigerator, which can cause uneven setting.
Storage and Shelf Life
Ganache shelf life depends on the cream-to-chocolate ratio and any additions. A standard dark chocolate ganache stored in an airtight container at room temperature (below 20°C) lasts four to five days. Refrigerated, it keeps for two to three weeks. Ganaches containing fresh fruit purées or butter have shorter shelf lives. For longer storage, freeze ganache in portions and thaw overnight in the refrigerator. Label everything with the date and ratio — this makes it easy to grab the right consistency for each application without guessing. Always bring ganache to room temperature before working with it; cold ganache tears when spread and can split when piped.
Conclusion
Mastering ganache unlocks an enormous range of confections. Once you're confident with ratios and emulsification, experiment with infusions and textural variations — add crushed praline for crunch, fold in whipped cream for a lighter mousse, or use it as a mirror glaze for showstopping tarts. Explore our full recipe library for inspiration, or reach out to us with your questions about chocolate technique.