- 4 cups heavy whipping cream
- 1 vanilla bean, split in half lengthwise
- 1/4 teaspoon salt
- 8 egg yolks
- 3/4 cup white sugar
- 2 tablespoons white sugar
- 1/2 cup cocoa powder
- Topping:
- 1/2 cup brown sugar, divided
- Preheat oven to 300 degrees F (150 degrees C).
- Combine heavy cream, vanilla bean, and salt in a saucepan over medium heat. Heat until surface of cream begins to shimmer, about 5 minutes. Remove from heat and take out vanilla bean.
- Whisk egg yolks, 3/4 cup plus 2 tablespoons white sugar, and cocoa together in a large bowl until well-blended. Pour hot cream over egg mixture a little at a time, stirring constantly, until all cream is incorporated and custard is smooth. Strain custard into a large glass measuring cup.
- Arrange eight 6-ounce ramekins in a roasting pan. Pour custard into ramekins. Pour enough warm water into the pan to come halfway up the sides of the ramekins. Cover pan loosely with aluminum foil.
- Bake in the preheated oven until custard is firm around the edges, but still wobbly in the center, about 1 hour. Remove from oven and let cool to room temperature, about 1 hour.
- Cover ramekins with plastic wrap and refrigerate until chilled, about 3 hours.
- Set oven rack about 6 inches from the heat source and preheat the oven's broiler.
- Remove ramekins from refrigerator and blot any liquid on the surface with a paper towel. Arrange ramekins on a baking sheet. Top each custard with 1 tablespoon of brown sugar, spreading evenly to the edges.
- Broil in the preheated oven until sugar is melted and crisp, 30 seconds to 2 minutes. Cool briefly, about 5 minutes, before serving.