In a saucepan, Whisk the erythritol into the egg yolk mixture and ensure it’s fully dissolved before adding the heavy cream.
Add heavy cream to the egg yolk mixture and heat over medium-low heat. Stir constantly until the mixture thickens slightly, about 5–7 minutes.
Remove from heat and stir in vanilla extract.
Pour the mixture into a container and let it cool to room temperature.
After cooking the custard, refrigerate it for 4–6 hours or overnight to fully cool and firm up before freezing.
freeze for 3-4 hours, stirring every 30 minutes during the first 2 hours to prevent ice crystals and achieve a smooth texture.
Scoop and enjoy your keto-friendly vanilla ice cream!