Bastien Tempering
Tempering is the technique of gradually changing an ingredient's temperature to prevent unwanted reactions — eggs (to prevent curdling at 85°C) or chocolate (to control cocoa butter crystals for gloss and snap).
Tempering is the technique of gradually changing an ingredient's temperature to prevent unwanted reactions. The word applies to two distinct kitchen processes: tempering eggs (to prevent curdling when adding them to hot liquids) and tempering chocolate (to control cocoa butter crystal formation for a glossy, snappy result).
Both share the same core idea: slow, controlled temperature change prevents the damage that rapid change would cause. Mastering tempering is what separates scrambled custard from a silky crème anglaise, and dull, streaky chocolate from a professional-looking bonbon.
How do you temper eggs?
When raw eggs meet hot liquid too quickly, the proteins coagulate instantly. You get scrambled bits floating in your sauce or custard. Tempering solves this by gradually raising the eggs' temperature so the proteins set smoothly and evenly.
I learned this the hard way making crème anglaise early on. I poured hot cream straight into the yolks, and within seconds I had sweet scrambled eggs. Now I treat that first ladle of hot liquid like the most important step in the whole recipe.
Step-by-step egg tempering
Egg tempering applications
Common mistakes when tempering eggs
The concept of carryover cooking applies here too. Once you pull your custard off the heat, residual thermal energy keeps cooking the eggs for another degree or two. Pull a couple degrees early if you're aiming for a precise target.
How do you temper chocolate?
Chocolate tempering is a completely different process that happens to share the same name. Here, you're controlling which type of cocoa butter crystal forms as the chocolate solidifies. Cocoa butter can crystallize in six different forms (I through VI). Only Form V produces the properties you want: glossy appearance, firm snap, and clean release from molds.
Why temper chocolate?
The white streaks on old or poorly stored chocolate (fat bloom) are cocoa butter that has migrated to the surface and recrystallized in an unstable form. Proper tempering prevents this entirely.
Chocolate tempering temperatures
Use an instant-read thermometer for accuracy. Temperature control is everything when tempering chocolate at home.
Tempering methods
The seeding method is the most practical approach for tempering chocolate at home. It uses already-tempered chocolate (from a bar) to "seed" the melted chocolate with stable Form V crystals.
After testing dozens of batches, I find that finely chopping the seed chocolate makes the biggest difference. Large chunks take too long to melt and the working chocolate can over-cool before they dissolve.
The tabling method is the traditional professional technique. It's faster for large batches and gives experienced chocolatiers more control, but requires a marble slab and practice.
The microwave method is the quickest way to temper chocolate for small batches. It works because you never fully melt all the chocolate, preserving some existing Form V crystals.
This method works best with high-quality couverture chocolate. Compound chocolate (made with vegetable fats instead of cocoa butter) doesn't need tempering at all.
Tempering chocolate without a thermometer
No thermometer? You can still temper chocolate using touch and visual cues. Dab a small amount on your lower lip. Melted chocolate at the correct working temperature should feel slightly cool — not warm, not cold. It's less precise than using an instant-read thermometer, but chocolatiers used this technique for centuries before digital probes existed.
The knife test is your real confirmation. Dip a clean knife blade into the chocolate and set it at room temperature. Properly tempered chocolate will:
- Set within 5 minutes (not still wet or tacky)
- Have a uniform glossy surface
- Release cleanly from the metal without sticking
- Snap cleanly when broken (not bend)
If the test fails, re-temper by reheating above the melt temperature and starting over. Chocolate can be tempered repeatedly without damage.
Tempering in Fond
Fond's Cook mode walks you through tempering steps with built-in timers and temperature targets. Whether you're making custard, chocolate truffles, or carbonara, the app guides the temperature transitions so you get consistent results every time.
