Yield: 1 quart
Prep Time: 20 minutes
Total time (including chilling): 6 hours
1 ½ cups (355ml) heavy cream
6 ounces (170g) dark chocolate couverture, chopped
1/3 cup (65g) granulated sugar
3 large eggs
½ teaspoon vanilla extract
1/4 teaspoon salt
3 ounces (85g) dark chocolate, finely chopped
Whip cream in a medium bowl until soft peaks form. Set aside in refrigerator.
Melt chocolate (in the microwave on 50% power in 30-second blasts, or using the double boiler method). Set aside to cool.
In a saucepan, bring 1 inch of water to a low simmer. Place the eggs and sugar in a heatproof bowl on the saucepan and cook, stirring constantly, until mixture reaches 160°F (71°C), about 5 minutes. Remove from the heat and add the vanilla and salt. With an electric mixer whip on high speed until the mixture is pale yellow and more than doubled in size, 5-8 minutes. Mix approximately one third of egg mixture into the melted chocolate, then mix the chocolate mixture back into remaining egg mixture. Mix one fourth of whipped cream into chocolate mixture until smooth, then gently fold in the remaining whipped cream until mostly incorporated, add chocolate chunks and continue folding until no streaks remain. Transfer to a quart-sized container, cover and freeze until firm.