Mastering Pastry Cream
The difference between a weeping, grainy custard and a stable, sliceable cream lies entirely in the boil. Once you master the timing of that final thickening phase, you have a foundation for éclairs, fruit tarts, and layer cakes.
Control the temperature to keep it smooth.
Keep your whisk moving constantly to prevent the eggs from scrambling. If you catch a few lumps, pass the finished cream through a fine-mesh sieve before cooling.
- Heavy-bottomed saucepan
- Balloon whisk
- Heat-proof bowl
- Plastic wrap
- Fine-mesh sieve
What goes in.
- 2 cupswhole milk
- 1/2 cupgranulated sugar
- 1/4 cupcornstarch
- 4large egg yolks
- 2 tbspunsalted butter
- 1 tspvanilla bean paste
Don't fear the bubble
After the mixture thickens into a paste, you must continue whisking over the heat for at least one full minute after it reaches a boil. This cooks out the raw starch and activates the thickening power, ensuring the cream doesn't turn back into a liquid as it cools.
The method.
Infuse the milk
Bring the milk to a gentle simmer in a saucepan. Do not let it reach a violent boil.
Temper the yolks
Whisk the sugar, cornstarch, and egg yolks together until pale. Slowly pour half the warm milk into the egg mixture while whisking constantly to prevent curdling.
Combine
Pour the egg-milk mixture back into the saucepan with the remaining milk. Cook over medium-low heat.
Thicken
Whisk constantly as the cream thickens. Once it hits a bubble, whisk for a full minute, then remove from heat.
Finish and chill
Whisk in the butter and vanilla. Strain into a clean bowl and press plastic wrap directly onto the surface to prevent a skin from forming.
Other turns to take.
Chocolate
Whisk in 3 ounces of chopped dark chocolate immediately after removing from heat.
Diplomat
Fold in an equal volume of softly whipped cream once the pastry cream has completely cooled.
When it doesn't go to plan.
Use a heavy-bottomed pan to prevent scorching the sugar and milk.
If you see steam coming off the milk but no bubbles, it's ready for tempering.
Pressing plastic wrap directly against the cream is non-negotiable; it stops a tough, leathery skin from hardening on top.
The ones that keep coming up.
Why is my pastry cream grainy?
You likely cooked the eggs too quickly or didn't whisk enough. If it happens, pass the finished cream through a fine-mesh sieve immediately.
Can I use flour instead of cornstarch?
Yes, but use double the amount of flour by weight. The texture will be slightly less translucent and more opaque.
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