Peel the avocados, then add it in the food processor with almond milk, vanilla extract, the sweetener and heavy cream. Mix until well incorporated, until you have a nice and smooth mixture.
Pour the ice cream in a freezer-safe container and cover it.
After that, put the ice cream in the freezer for at least 6 hours.
Serve cold.
Notes
Keep it in the freezer in an airtight container until needed.