How to Fix Split or Grainy Ganache

Ganache is two ingredients, chocolate and cream, but it behaves like a delicate sauce. When it works, it is glossy and smooth. When it breaks, you see a slick of oil on top, a grainy texture underneath, or a stiff, curdled paste. Ganache is an emulsion of cocoa butter and milk fat suspended in water from the cream, and anything that upsets that balance can split it.

The usual suspects are too much heat, too little liquid for the amount of fat, a sudden temperature change or too much aggressive stirring. Nearly every split ganache can be pulled back together with a little warm liquid and patient mixing, so do not throw it out.

What a broken ganache looks like

A split ganache looks shiny and greasy, with a film of yellowish fat on the surface or around the edge of the bowl. The chocolate underneath may look grainy or curdled. If you lift a spoonful, it drops in clumps rather than flowing in a smooth ribbon.

Do not confuse a ganache that is just cooling with one that has split. As ganache cools, it thickens and loses some shine, but it stays smooth. Split ganache stays oily no matter what temperature it reaches.

Common causes

Overheating is the biggest one. If the cream boils hard and goes straight onto the chocolate, or if the bowl sits over simmering water too long, the cocoa butter separates. Aim for cream that is steaming with small bubbles at the edge, not at a rolling boil, and let it sit on the chopped chocolate for a few minutes before stirring.

The second cause is ratio. Dark chocolate with a very high cocoa percentage contains more fat and less sugar, so it needs a little more liquid. Adding cold liqueur, butter straight from the fridge or chilled fruit purée to warm ganache shocks it and can also cause a split. Whisking hard incorporates air and can break it too.

• Cream boiled too hard or ganache overheated
• High-percentage chocolate with too little cream
• Cold additions to warm ganache
• Vigorous whisking

How to bring it back

Warm 1 to 2 tbsp of milk or cream to roughly body temperature. Add it to the center of the broken ganache and stir in small, tight circles with a spatula, gradually widening the circles as the center turns smooth and glossy. Add more warm liquid a spoonful at a time if needed.

For a larger or more stubborn batch, use an immersion blender. Tilt the bowl so the blade is fully submerged and blend in short pulses without lifting it above the surface, which would beat in air. Most ganaches come together within 30 seconds. If the ganache is very hot and oily, let it cool to about 35°C (95°F) before blending.

Ratios by chocolate type

Ratios are by weight, chocolate to cream. For dark chocolate in the 55 to 70 percent range, 1:1 gives a pourable glaze while warm and a spreadable frosting or filling once cool; 2:1 sets firm enough to roll truffles. Above 70 percent, add a little extra cream.

Milk chocolate is softer, so use about 2:1 for a filling and 2.5:1 for truffles. White chocolate is softest of all and needs about 3:1 for a firm set or 2:1 for a softer filling or drip. Always chop chocolate finely so it melts evenly at the cream's temperature.

• Dark 1:1: glaze or soft frosting
• Dark 2:1: truffles and firm fillings
• Milk 2:1 to 2.5:1: fillings and truffles
• White 2:1 to 3:1: softer to firmer

Grainy versus split

A grainy ganache that is not oily often contains chocolate that seized from a drop of water or steam, or that scorched. Seized chocolate can usually be smoothed by adding more warm cream and blending, since more liquid dissolves the clumps. Scorched chocolate tastes burnt and bitter, and no amount of mixing fixes that flavor.

Whipped ganache can also turn grainy if it is overwhipped. Stop as soon as it lightens in color and holds soft peaks. If it goes too far, melt it gently and chill it again before rewhipping.

Common questions

Can I fix split ganache with butter?

Butter adds fat, which usually makes the imbalance worse. Warm liquid is the better fix. Once the ganache is smooth, you can stir in room-temperature butter for richness and shine.

How long does ganache keep?

Ganache made with fresh cream is perishable. Refrigerate it covered for up to about a week and bring it to room temperature or rewarm it gently before using. Do not leave it at room temperature for more than about 2 hours.

Why did my ganache set too hard?

It had more chocolate than the use called for. Rewarm it gently and stir in warm cream a little at a time until it reaches the texture you want, then let it cool again.