Tempering Chocolate
Tempering is the process of heating and cooling chocolate to stabilize its cocoa butter crystals. When done correctly, the chocolate develops a clean snap, a smooth sheen, and pulls away from a mold without sticking. If the temperature fluctuates outside the target range, the crystals fail to set uniformly, leading to streaks or a soft texture.
Control is the only ingredient that matters here.
Do not let a single drop of water touch your bowl, or the chocolate will seize into a grainy mass. Keep a precise digital thermometer ready, as you are working within a narrow window of only a few degrees.
- digital instant-read thermometer
- heavy-bottomed glass or stainless steel bowl
- silicone spatula
- baking sheet
What goes in.
- 1 lbhigh-quality dark chocolate (couverture)
Maintaining crystal structure
You melt two-thirds of the chocolate to break its existing structure, then stir in the remaining third of solid 'seed' chocolate to force the cocoa butter to reform into stable, shiny crystals.
The method.
Melt
Place two-thirds of the chocolate in your bowl over a pot of simmering water. Ensure the bottom of the bowl does not touch the water. Melt until it reaches 115°F.
Remove and Seed
Take the bowl off the heat. Immediately stir in the remaining room-temperature chocolate pieces. This lowers the temperature and introduces the structure you need.
Cool and Stir
Continue stirring steadily. You want the mass to drop to exactly 88°F to 90°F. Do not rush this; the movement of the spatula encourages the crystals to bond correctly.
Test
Dip the tip of a knife into the chocolate and set it aside for three minutes. If it sets with a firm, streak-free surface, you are ready to work.
When it doesn't go to plan.
If the chocolate dips below 88°F and becomes too thick to work with, put it back over the steam for no more than 5 seconds at a time.
Work in a cool room; if your kitchen is above 72°F, the chocolate will refuse to set.
Use couverture chocolate rather than standard baking bars, as it contains extra cocoa butter specifically for this process.
The ones that keep coming up.
Why is my chocolate dull and streaky?
The chocolate was likely not held in the working temperature range (88-90°F) long enough, or the ambient room temperature was too high.
Can I reuse chocolate that didn't set?
Yes. You can simply remelt the chocolate and restart the tempering process from the beginning.
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