Chocolate Mint Gelato

Directions

1. 1
   Special equipment needed: ice cream maker.
2. 2
   Stir together 1/4 cup milk and cornstarch.
3. 3
   Whisk together sugar, cocoa, and remaining 1 1/2 cups milk in a small heavy saucepan and bring to a boil over moderate heat, stirring. Stir cornstarch mixture again and whisk into chocolate. Return to a boil, whisking, then remove from heat.
4. 4
   Add mint, a pinch of salt, and half of chocolate to saucepan, stirring.
5. 5
   Set saucepan in a large bowl of ice water to cool, whisking frequently.
6. 6
   Freeze chocolate mixture in ice-cream maker. When nearly frozen, add remaining chocolate and churn until blended.