- 4 cups half-and-half
- 1/2 cup (3 1/2 ounces) plus 1/2 cup (3 1/2 ounces) sugar
- 1/2 teaspoon sea salt
- 1 vanilla bean, split lengthwise in half, or 1 teaspoon vanilla extract
- 4 large eggs
- 4 large egg yolks
- 1/2 cup cornstarch
- 1 tablespoon unsalted butter, at room temperature
- 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.
- 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.
- 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.