Step 1: Prepare the Vanilla Infusion: In a medium saucepan, combine the heavy cream, whole milk, granulated sugar, and salt. If using a vanilla bean, add both the pod and the seeds to the saucepan. Heat the mixture over medium heat, stirring occasionally, until the sugar is completely dissolved and the mixture is steaming, but not boiling. Remove from heat.
Step 2: Infuse and Cool: If using a vanilla bean, cover the saucepan and let the mixture steep for at least 30 minutes, or up to 2 hours, to allow the vanilla flavor to fully infuse. This step is crucial for a rich vanilla taste. If using vanilla extract, skip the steeping process and add it after cooling.
Step 3: Strain and Chill: Remove the vanilla bean pod (if used). Pour the cream mixture through a fine-mesh sieve into a clean bowl to remove any solids. Cover the bowl with plastic wrap, pressing it directly onto the surface of the cream to prevent a skin from forming. Refrigerate for at least 4 hours, or preferably overnight. The mixture must be thoroughly chilled for optimal churning.
Step 4: Churn the Ice Cream: Ensure that the freezer bowl of the Cuisinart ice cream maker has been frozen solid for at least 24 hours. Remove the bowl from the freezer and place it in the ice cream maker. Pour the chilled cream mixture into the frozen bowl. Turn on the machine and churn according to the manufacturer's instructions, typically for 25-30 minutes, or until the ice cream reaches a soft-serve consistency.
Step 5: Harden the Ice Cream: Transfer the churned ice cream to an airtight container. Press a piece of plastic wrap onto the surface of the ice cream to prevent ice crystal formation. Freeze for at least 2-3 hours, or until firm enough to scoop.
Step 6: Serve and Enjoy: Remove the ice cream from the freezer a few minutes before serving to soften slightly. Scoop into bowls or cones and enjoy the homemade vanilla ice cream.
Optional Tips: For a richer flavor, add 2-3 egg yolks to the cream mixture in Step 1. Whisk the egg yolks with the sugar before adding the cream and milk. Be sure to cook the mixture gently to avoid scrambling the eggs. Strain the mixture thoroughly after cooking. Alternatively, for a dairy-free version, substitute the heavy cream and whole milk with coconut cream and almond milk.