For best results, weigh ingredients with a kitchen scale.
Ingredients
500mlwhole milk(2 cups)
100gwhite granulated sugar or caster sugar(½ cup / 3 ½oz)
55gcornflour (US cornstarch)(½ cup / 2oz)
4egg yolks from large eggs
1teaspoonvanilla bean paste or vanilla extract
pinchsalt
300gunsalted buttersoftened (10 ½oz)
Instructions
In a heavy based, medium saucepan, over medium heat, heat 1 ½ cups of the milk and all the sugar, stirring to dissolve until it reaches steaming point.
Add the cornflour, egg yolks and remaining ½ cup of milk to a medium mixing bowl. Whisk, using a balloon whisk until smooth and combined.
While gently whisking, very slowly drizzle the hot milk into the eggs. Don’t pour it too quickly or you’ll cook the eggs.
Return the custard mixture to the pan.
Cook over medium heat, gently stirring with a whisk the entire time until it starts to thicken and bubble. It will get very thick but just keep moving it around.
As soon as you see the first bubbles appear, continue cooking and stirring for a full minute to activate the cornflour.
Remove from the heat and stir in the vanilla and salt.
Pour the pastry cream into a bowl or container, then press plastic wrap to the surface to prevent a skin from forming. Chill until completely cold.
Once the pastry cream has set, remove it from the fridge and let it return to cool room temperature.You can proceed before bringing it to room temperature but you risk leaving lumps in your mousseline cream or overmixing it and have excessive air bubbles.
In a stand mixer with paddle attachment, beat the butter until it’s pale and creamy.
Add the pastry cream one spoonful at a time, beating just until each is combined.
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Notes
Yield: 3 cups.
Pastry cream can be chilled for up to 3 days before use and must be eaten within 3-4 days of making it.
Mousseline cream should be used within 3-4 days of making the pastry cream.