π« Chocolate Ganache Calculator
Exact chocolate-to-cream ratios by weight for dark, milk, and white chocolate.
Ganache Recipe
How Much Cream for Your Chocolate?
Ganache is two ingredients in a precise ratio by weight: chocolate to cream. Dark chocolate needs less cream because its cocoa solids set firmly; white chocolate needs the most. Enter your chocolate amount, pick the type and texture, and the calculator returns the exact cream weight plus cup measures.
Enter your chocolate in ounces, grams, or cups. Weighing is strongly recommended.
Pick dark, milk, or white chocolate, then soft (glaze, drip) or firm (truffles, piping).
Chop the chocolate fine, heat the cream to just below boiling, pour over, wait 5 minutes.
Stir gently from the center until glossy. Use warm for drips, cooled to peanut-butter consistency for frosting.
Ganache Ratios by Weight
Eight ounces of dark chocolate for a soft glaze needs 8 ounces of cream (about 1 cup). The same 8 ounces for firm truffles needs 4 ounces of cream (1/2 cup). Eight ounces of white chocolate for truffles needs just 2.7 ounces of cream. The pattern: less cocoa solid means more chocolate per unit of cream.
Worked Example: Drip for an 8-Inch Cake
Enter 8 ounces, dark chocolate, soft texture. The calculator returns 8 ounces of heavy cream, about 1 cup. Chop 8 ounces of bar chocolate fine, heat 1 cup of cream to steaming, pour over, wait 5 minutes, stir from the center. Cool to about 90Β°F and drip over a cold cake with a spoon or squeeze bottle. Total ganache: 16 ounces, enough for a generous drip plus a thin top coat.
Why Weight Beats Volume Here
A cup of chopped chocolate can weigh anywhere from 5 to 7 ounces depending on the chop, which swings the ratio by 40%. Ganache is an emulsion, and emulsions are ratio-sensitive: too much cream and it never sets; too little and it seizes. A scale removes the single biggest variable. If you must use cups, 1 cup of chocolate chips is about 6 ounces, and 1 cup of heavy cream is 8 ounces (238 grams).
Practical Tips for Glossy Ganache
Chop finely and uniformly; big chunks survive the hot cream and turn lumpy. Do not boil the cream: just below simmering is hot enough. Wait the full 5 minutes before stirring; early agitation cools the mixture before the chocolate melts. Stir gently, not vigorously; whipping in air dulls the gloss. For extra shine, a tablespoon of corn syrup or soft butter whisked in at the end works wonders.
Flavor variations build on the same ratios. Add a tablespoon of espresso powder with the hot cream for mocha ganache, or steep the cream with orange peel, mint, or lavender for 20 minutes before straining and reheating. A tablespoon or two of liqueur goes in with the warm cream, never cold. For a mirror glaze finish, use the soft ratio, cool to 90Β°F, and pour over a frozen cake in one confident pass; the cold sets it instantly into glass.
Troubleshooting Ganache Problems
Grainy ganache usually means the chocolate seized from too-hot cream or water contact; an immersion blender for 10 seconds re-emulsifies most cases. If it is too thin to set, the ratio was off or the chocolate had low cocoa butter: whisk in more chopped chocolate a little at a time. Too thick? Warm cream, a tablespoon at a time, whisking gently. Dull finish? A teaspoon of corn syrup or soft butter at the end restores the gloss.
Temperature discipline prevents most failures. Cream should steam, never boil: boiling scorches milk proteins and the scorched flavor carries into the ganache. Chocolate should be chopped to pea-size or smaller so it melts in the resting time; big chunks demand stirring, and stirring early cools everything into lumps. And the room matters: ganache sets best at cool room temperature around 68Β°F. A hot kitchen keeps it soft for hours and invites blooming on the surface.
Scaling ganache up or down is pure ratio math, which is why the calculator exists. Doubling a 1:1 dark ganache means exactly double both weights; the method does not change at any scale. For tiny batches under 4 ounces, use a small bowl and rest 30 seconds instead of 90, since small masses lose heat fast. And when making multiple ratios for a dessert table, label each bowl with the ratio and chocolate type: 1:1 dark and 2.5:1 white look identical in the bowl but behave nothing alike.
Common Mistakes to Avoid
Using chips without chopping finer is the most common: their stabilizers fight the melt. Overheating the cream scalds the chocolate and splits the emulsion. Adding cold flavorings (liqueur, extracts) straight from the fridge can seize the ganache; warm them first or add with the hot cream. And refrigerating before it sets at room temperature can dull the finish; let it set at room temp for 4 hours first.
Second Worked Example: Truffles for a Party
You need 40 truffles for a party. Truffle ganache uses a 2:1 ratio of dark chocolate to cream by weight. Plan 10 grams of ganache per truffle: 40 Γ 10 = 400 grams of ganache. At 2:1, that is about 265 grams of dark chocolate and 135 grams of heavy cream (400 divided into 3 parts: 2 parts chocolate, 1 part cream). Chop the chocolate fine, heat the cream to a bare simmer, pour over, wait 90 seconds, and stir from the center outward until glossy. Chill 2 hours, scoop with a teaspoon, and roll fast: warm hands melt truffles. Yield is forgiving here; if you get 36 bigger truffles instead of 40, nobody complains.
Milk and White Chocolate: Why the Ratio Flips
Dark chocolate sets firmly at 2:1 because it is mostly cocoa solids and cocoa butter. Milk chocolate contains milk solids and sugar instead of some cocoa, so it needs more chocolate to set: the standard truffle ratio is about 2.5:1 or even 3:1. White chocolate has no cocoa solids at all, just cocoa butter, sugar, and milk, so it needs 3:1 to firm up properly. This is also why white ganache is fussier: cocoa butter melts at body temperature, so white truffles soften fast in warm hands and need a longer chill. When in doubt with milk or white, add chocolate, not cream; you can always thin a too-firm ganache with a spoon of warm cream, but a too-soft one means starting over.
Temperature Control: The 90-Second Rule
Two mistakes ruin ganache: boiling the cream and stirring too early. Bring the cream to a bare simmer, with small bubbles at the edges, never a rolling boil; boiling cream is hot enough to scorch chocolate and split the emulsion. Pour it over finely chopped chocolate, then wait a full 90 seconds before touching it. That rest melts the chocolate gently from the outside in. Then stir slowly from the center in small circles, widening gradually. Vigorous whisking beats in air bubbles that dull the finish and can break the emulsion. If it splits anyway, whisk in a tablespoon of warm milk; the extra liquid often pulls it back together.
Water Is the Enemy: The Seizing Problem
A single drop of water in melting chocolate causes seizing: the sugar dissolves and the cocoa particles clump into grainy paste. This is why the bowl, spatula, and chopping board must be bone dry, and why steam from a double boiler must never drip in. Seized chocolate looks ruined but is not: keep adding warm liquid (cream or water) a spoon at a time while stirring, and it smooths back into a sauce. It will not set as a truffle anymore, but it makes an excellent ice cream topping, which is a fine rescue.
Frequently Asked Questions
What is the ratio of chocolate to cream for ganache?
By weight: dark chocolate 1:1 for a soft glaze or 2:1 for firm truffles, milk chocolate 1.5:1 soft or 2.5:1 firm, white chocolate 2.5:1 soft or 3:1 firm. Dark chocolate sets firmest because of its cocoa solids; white needs the most chocolate because it has only cocoa butter. Always measure by weight, not cups.
How do you make chocolate ganache?
Chop the chocolate finely and place it in a bowl. Heat heavy cream to just below a boil, pour it over the chocolate, wait 5 minutes undisturbed, then stir slowly from the center outward until glossy. Cool to peanut-butter consistency for frosting, or use warm for drips and glaze.
Why did my ganache split or look grainy?
Usually the cream was too hot or the chocolate was stirred too soon and too hard. Fix a split ganache with an immersion blender for a few seconds, or whisk in a tablespoon of warm milk. Prevent it next time: let the hot cream sit on the chopped chocolate a full 5 minutes before stirring gently.
Can I use chocolate chips for ganache?
In a pinch, yes, but bars are better. Chips contain stabilizers that resist melting, which can make ganache thick or grainy. Chopped baking bars with real cocoa butter melt smoothly into a glossy emulsion. If chips are all you have, chop them smaller and be patient with the resting step.
How long does ganache last?
Two days at cool room temperature, 1 week refrigerated, or 6 months frozen. Press plastic wrap directly on the surface to prevent a skin. Rewarm refrigerated ganache gently in short microwave bursts, stirring between, or let it come back to room temperature naturally.
Can you whip ganache?
Yes: make a 1:1 dark chocolate ganache, chill it until firm but scoopable (about 2 hours), then whip with a mixer until light and fluffy. Whipped ganache makes a mousselike frosting. Do not overwhip or it turns grainy. Use it the same day for the best texture.
What cream is best for ganache?
Heavy cream or heavy whipping cream with 36% fat or more. The fat is what forms the stable emulsion with the cocoa butter. Light cream and half-and-half make a thinner, less stable ganache that can split. Check the label: "heavy cream" is the requirement, not a suggestion.
How much ganache do I need for a cake?
For a drip on an 8-inch cake, about 150 grams total (75 g chocolate + 75 g cream at 1:1). To frost the whole cake, 600 to 800 grams total. For a dozen truffles, 200 grams of chocolate with 100 grams of cream at 2:1. This calculator converts your chocolate amount to the matching cream for any of these jobs.
Why is my white chocolate ganache so thick?
White chocolate has no cocoa solids, only cocoa butter and sugar, so it seizes and thickens fast. Use the 3:1 ratio for firm uses and work slightly warmer than you would with dark. If it gets too thick to spread, whisk in warm cream a tablespoon at a time. An immersion blender rescues most white chocolate mishaps.
Can ganache be made without cream?
Yes, with coconut cream for a dairy-free version: use the same ratios with the thick cream from a chilled can of coconut milk. The coconut flavor is noticeable, which suits tropical desserts. Butter-based ganache is another route but behaves differently. For classic flavor and texture, dairy heavy cream remains the standard.