For this use, the pastry cream needs to be thicker and tighter so that it bakes up like a custard. It has extra yolks and a little extra cornstarch to accomplish this. Plus, as my brother explained when he visited San Francisco in 2011, the pastry cream should be warm when it is piped into the bretzels . Make it right before you shape your bretzels and, whatever you do, do not stir the cream to loosen it before transferring it to a pastry bag. This will break the cream and it will not bake properly. For convenience, I've included a complete ingredient list; follow the preceding method. But once it is made, keep the pastry cream in the saucepan or transfer it to a bowl. This will help it stay warm until you need it.
Recipe information
Yield
Makes about 2 cups
Ingredients
Preparation
Step 1
Place the half-and-half, 1/2 cup of the sugar, and the salt in a large saucepan over medium heat. Scrape the vanilla bean seeds into the milk and then drop in the pod. Bring to a boil, remove from the heat, and let the vanilla infuse into the milk while you work with the eggs.
Step 2
In a medium bowl, whisk the eggs with the remaining 1/2 cup of sugar. Whisking some of the sugar into the eggs helps prevent lumps later when you whisk in the hot cream. Whisk in the cornstarch until smoothly incorporated.
Step 3
Remove the vanilla bean, rinse, dry, and reserve for another use. While whisking vigorously, pour the hot milk into the eggs a little at a time. Then pour the mixture back into the saucepan and place over medium heat. Bring to a boil, whisking all the while and making sure to scrape the bottom and sides of the pan. Boil until the pastry cream thickens, about 1 minute. Remove the pan from the heat. If the cream looks lumpy, pass it through a sieve into a bowl. Otherwise, whisk in the butter and vanilla extract, if using, and then transfer the pastry cream to a bowl to cool for about 5 minutes. Lay a piece of plastic wrap directly on the surface to prevent a skin from forming. Let cool to room temperature.
