MAKE THE ICE CREAM
• Stir the milk and 1/3 cup of the sugar together in a small saucepan. Scrape the vanilla seeds from the bean into the pan and then add the bean. Bring the milk to a boil over medium heat. Remove from the heat, cover the top of the pan with plastic wrap, and let steep at least 1 hour at room temperature, or preferably overnight in the refrigerator.
• Strain the milk through a fine-mesh sieve and return to the saucepan. Bring to a simmer over medium heat.
• While the milk is reheating, combine the egg yolks and remaining 1/3 cup sugar in the bowl of a stand mixer fitted with a whip attachment. Beat on medium-high speed until the mixture is pale and thick and forms a ribbon when the whip is lifted from the bowl, 3 to 5 minutes.
• Switch the mixer to low speed. Slowly pour the hot milk mixture into the bowl and beat just until combined. Do not beat to froth.
• Return the mixture to the saucepan and cook over medium heat, stirring constantly, until the custard coats a spoon and registers 160°F on an instant-read thermometer, about 5 minutes.
• Pour through the fine-mesh sieve into a bowl and stir in cream. Cover bowl and refrigerate the custard overnight.
• The next day, churn the custard in an ice-cream maker according to the manufacturer’s instructions. Fold the Recchiuti Brownie chunks into the ice cream by hand. Garnish individual servings with Burnt Caramel Sauce.
This is a variation on a recipe in Chocolate Obsession: Confections and Treats to Create and Savor, by Michael Recchiuti and Fran Gage.