01 -
Place whole milk in a medium saucepan. If using a vanilla bean, split it lengthwise, scrape out the seeds, and add both seeds and pod to the milk. Warm over medium-low heat and bring just to a simmer. Once the milk simmers, remove from heat, cover, and let infuse for at least 20 minutes. If using vanilla paste, skip the infusion.
02 -
In a large heatproof bowl, whisk egg yolks with caster sugar until smooth. Add cornstarch and whisk thoroughly until the mixture is thick and free of lumps.
03 -
Gradually pour warm milk over the egg mixture, whisking constantly to temper the yolks and prevent curdling. Mix until fully combined, then return the mixture to the saucepan.
04 -
Place the saucepan over low heat. Cook, whisking continuously, for about 5 minutes or until the cream thickens and reaches 82°C. Do not let the mixture boil. Once thickened, remove from heat.
05 -
Transfer the custard to a clean bowl or shallow dish. Cover directly with plastic wrap touching the surface to prevent a skin forming. Refrigerate for at least 2 to 3 hours, preferably overnight, until thoroughly chilled.
06 -
Pour cold heavy cream into a large mixing bowl. Using a hand or stand mixer fitted with a whisk attachment, beat on medium speed, gradually increasing to medium-high, until stiff peaks form.
07 -
Remove the chilled pastry cream from the refrigerator. Whisk to loosen it. Gently fold in one quarter of the whipped cream using a whisk. Switch to a spatula and fold in the remaining whipped cream in two or three additions until fully combined and the mixture is light and airy.
08 -
If not used immediately, keep in the refrigerator with plastic wrap pressed directly onto the surface. Consume within three days.