Beat eggs and sugar for 5 minutes, until thick and pale. Mix in the cocoa powder and beat until creamy. Add the cream, milk and vanilla until blended. Place batter into the fridge and chill at least 4 hours.
Pour batter into your ice cream maker and churn for 30 minutes. Ice cream will look gritty at this stage.
Transfer ice cream into a container and freeze until firm or enjoy as a soft serve ice cream.
If using the kitchen aid ice cream maker be sure to freeze your bowl for at least 24 hours before proceeding with the recipe.