Basil Ice Cream

Directions

1. 1
   Bring milk, basil, 1/4 cup sugar, and a pinch of salt to a boil in a 2-quart heavy saucepan, stirring, then remove from heat and let steep 30 minutes. Transfer to a blender (reserve saucepan) and blend until basil is finely ground, about 1 minute.
2. 2
   Beat together yolks and remaining 1/4 cup sugar in a medium bowl with an electric mixer until thick and pale, about 1 minute. Add milk mixture in a stream, beating until combined well. Pour mixture into reserved saucepan and cook over moderate heat, stirring constantly with a wooden spoon, until mixture coats back of spoon and registers 175°F on thermometer (do not let boil). Immediately remove from heat and pour through a fine-mesh sieve into a metal bowl. Set bowl in a larger bowl of ice water and stir until cold, 10 to 15 minutes.
3. 3
   Stir in cream and freeze in ice cream maker. Transfer ice cream to an airtight container and put in freezer to harden, at least 2 hours.