Chocolate Gelato

Step 1
Heat milk, 1/2 the sugar, and cream in a heavy saucepan until simmering and sugar is dissolved, about 5 minutes, being careful not to scorch the milk. Remove milk from heat and whisk in cocoa powder and dark chocolate. Allow to cool slightly.

Step 2
Meanwhile, beat egg yolks and remaining sugar in a large bowl using a whisk or electric beater until thick and pale yellow. Add about 1 cup of the slightly cooled chocolate mixture in a slow stream to avoid cooking eggs, whisking constantly until well combined. Add the rest of the chocolate mixture and return to the saucepan over medium-low heat. Stir constantly until thickened enough to coat the back of a spoon, about 5 minutes more.

Step 3
Strain custard through a sieve into a bowl and cover with plastic wrap touching to mixture to prevent a skin from forming. Refrigerate 8 hours to overnight.

Step 4
Pour cold custard into an ice cream maker and freeze according to manufacturer's instructions, about 20 minutes. Transfer to an airtight container and freeze until hardened, about 1 hour.