01 -
In a saucepan, heat whole milk and 240 ml of the heavy cream over medium heat until warm, avoiding boiling.
02 -
Whisk egg yolks with granulated sugar in a separate bowl until the mixture is pale and thick.
03 -
Gradually pour the warm milk and cream into the yolk mixture, whisking constantly to combine without curdling.
04 -
Return the blend to the saucepan and cook on low heat, stirring constantly, until the mixture thickens slightly and coats the back of a spoon (77–80°C).
05 -
Strain the custard through a fine-mesh sieve into a clean bowl. Stir in the remaining 240 ml heavy cream and vanilla extract or seeds.
06 -
Allow the custard to cool to room temperature, then cover and refrigerate for a minimum of 4 hours or overnight.
07 -
Pour the thoroughly chilled mixture into an ice cream maker and churn according to manufacturer's guidelines, typically 20–25 minutes.
08 -
Transfer the churned ice cream to an airtight container and freeze for 2–4 hours to achieve optimal firmness before serving.