01 - In a medium saucepan, combine the heavy cream, whole milk, and half of the sugar. Heat over medium until the mixture is steaming but not boiling.
02 - In a separate mixing bowl, whisk together the egg yolks, remaining sugar, and salt until the mixture is pale and slightly thickened.
03 - Gradually whisk the hot cream mixture into the yolk mixture to temper the eggs, then pour the combined mixture back into the saucepan.
04 - Cook over low heat, stirring constantly with a wooden spoon, until the custard thickens and coats the back of the spoon, reaching 170–175°F (77–80°C).
05 - Remove the saucepan from heat and stir in the pure vanilla extract until evenly incorporated.
06 - Strain the custard through a fine-mesh sieve into a clean bowl. Cool to room temperature, then cover and refrigerate for at least 4 hours or overnight.
07 - Pour the chilled custard into an ice cream maker and churn according to the manufacturer's instructions, approximately 20–25 minutes, until thick and creamy.
08 - Transfer the churned ice cream to a lidded freezer-safe container and freeze for at least 2 hours until firm.