Chocolate Tempering: Methods, Temperatures and Troubleshooting
Tempering is the controlled crystallization of cocoa butter. Done well, it gives chocolate a glossy surface, a clean snap and enough contraction to release from a mold. Done badly, you get dull streaks, a soft bite and a grey film a few days later. This guide explains what is happening and how to get a reliable temper at home.
What tempering actually does
Cocoa butter can solidify in several crystal forms, and only one of them, usually called Form V, gives the finish we expect from good chocolate. Melting chocolate fully erases every crystal. Tempering rebuilds the stable ones: you cool the chocolate so crystals begin to form, then warm it slightly so the unstable crystals melt away and the stable ones remain to seed the rest.
Temperature guide
| Chocolate type | Melt to | Cool to | Working temperature |
|---|---|---|---|
| Dark | 45–50 °C | 27–28 °C | 31–32 °C |
| Milk | 45 °C | 26–27 °C | 29–30 °C |
| White | 40–45 °C | 25–26 °C | 28–29 °C |
These are commonly published ranges. Formulas differ between brands, so check the technical sheet for the chocolate you use and treat these numbers as a starting point.
Method 1: seeding
Seeding is the most forgiving method for home kitchens.
- Chop the chocolate and set aside about a quarter of it. This reserved portion must already be in temper, which is usually the case for couverture buttons or callets straight from the bag.
- Melt the rest gently, over barely simmering water or in short microwave bursts at reduced power, stirring often, until it reaches the melting temperature for its type.
- Take it off the heat and stir in the reserved chocolate a little at a time.
- Keep stirring until the mixture cools to the “cool to” temperature. Remove any unmelted pieces.
- If needed, warm it for a few seconds at a time until it reaches the working temperature, and test it.
Method 2: microwave
For small amounts, heat chopped chocolate at 50% power in bursts of 20 to 30 seconds, stirring thoroughly each time. Stop while some lumps remain, stir until they melt, and then add seed chocolate as above. The most common mistake is overheating, so be patient.
Method 3: tabling
Pour about two thirds of the melted chocolate onto a clean, dry marble or granite slab. Work it back and forth with a palette knife and scraper until it thickens and cools, then scrape it back into the remaining warm chocolate and stir. Check the temperature and adjust. Tabling is quick once practiced but takes a few attempts to master.
How to test your temper
Dip the tip of a knife or spoon, or spread a small streak on parchment paper. In a room at roughly 18 to 20 °C, well-tempered chocolate sets within about three to five minutes with an even gloss and no streaks. If it stays soft and tacky or sets with swirls, it is not in temper.
Troubleshooting
Streaky or dull surface
The chocolate was probably not in temper, or it was overheated past the working temperature, which melts the stable crystals. Remelt and start again.
Thick, grainy chocolate
Water is the usual culprit. Even a drop of steam or a damp spoon can make chocolate seize. Overheating can also thicken it. Seized chocolate can be repurposed in a ganache or sauce, but it will not temper well.
Chocolate that will not release from the mold
Under-tempered chocolate does not contract as it sets, so it sticks. Make sure the mold is clean, dry and polished, and that the chocolate is in temper before filling.
White film after a few days
Fat bloom is a greyish, greasy-looking film caused by poor tempering or temperature swings during storage. Sugar bloom is a dry, rough white coating caused by moisture dissolving sugar on the surface. Both affect appearance and texture, not safety.
Keeping chocolate in temper
Once tempered, keep the chocolate at its working temperature, stirring now and then. If it cools and thickens, warm it very gently for a few seconds. If it overheats, add a little tempered chocolate to cool it down and re-seed.
Storing finished chocolate
Store finished pieces in a cool, dry, stable place, ideally around 16 to 18 °C, away from strong smells and sunlight. If you must chill them, seal them well and let them come to room temperature before opening to avoid condensation, which leads to sugar bloom.
Key takeaways
- Tempering builds stable cocoa butter crystals that give gloss, snap and shrinkage.
- Use a thermometer and check the technical sheet for your brand.
- Seeding is the easiest method at home.
- Keep everything dry and avoid overheating.
- Bloom looks bad but is not a safety issue.
Frequently asked questions
Can I temper chocolate in the microwave?
Yes. Heat in short bursts at reduced power, stir between bursts, and stop before the chocolate reaches its working temperature. Then use the seeding method to bring it into temper.
Do I need a thermometer to temper chocolate?
A thermometer is strongly recommended because the working range is only a couple of degrees wide. An infrared or probe thermometer both work.
Why did my chocolate suddenly turn thick and grainy?
A small amount of water or steam is the most common cause of seized chocolate. Overheating can also make it thick. Keep bowls and tools completely dry.
Is chocolate with bloom safe to eat?
Bloom is a change in appearance and texture, not a safety problem. You can remelt and re-temper bloomed chocolate or use it in baking.