Ah, pastry cream. You are a wily one.
I’ve made pastry cream three or four different ways in my career, and I’m sure I’ll make it more ways depending on where I work and what I’m doing. Some are strong believers in using cornstarch for thickening; others use PCP (pastry cream powder) as a supplement to their recipe. I don’t have too much of a preference myself, although I suppose I’d stay away from using any cheats and just make it as old-fashioned as possible.
Pastry cream is such a cool component in that you can do a million things with it. Fruit tarts? Get some small tart shells, fruit, and pastry cream. A layer to break up a boring cake. A sweet addition to a trifle. Hell, put it in a donut.
I found a small notebook from when I lived in New York City (I’ve got like three of these) that had a few recipes in it, and found this basic recipe for pastry cream. You’ll need to have a scale, as I did not do this by volume.
You’ll need:
12 egg yolks
1 liter of milk
250g of sugar
150 g of flour
2 vanilla beans (or vanilla extract will do – get the kind with seeds in it if you can)
50 g of somewhat softened butter (NOT MELTED IN THE MICROWAVE.)
Whisk your yolks together with the vanilla extract (or scrape the two vanilla beans into the yolks and whisk). Add the flour GRADUALLY to your yolks and whisk. Add the milk to this concoction and whisk. Then get a chinois or fine strainer and strain into a pot/saucepan/whatever you like to call it.
Heat this mixture up, stirring constantly, until it starts to thicken. I would not recommend doing it on high heat, as you’ve got a better chance of burning it to the bottom of the pot. Burnt pastry cream is a downer.
When the mixture starts to thicken and you can see it’s getting to “pastry cream status,” go just a hair longer with the heating and pull it off the stove.
Put this mixture into your KitchenAid/Cuisinart/whatever with the paddle attachment, and beat in the butter. Start slow and work the speed up so you do not wear the pastry cream.
If you like, you can add some coffee in very small amounts to change the flavor, or a little more vanilla, or maybe a hint of chocolate syrup. Don’t go overboard unless you’re really trying to mask the initial vanilla flavor with something else.