Scoop avocado into a bowl, then add coconut milk, cream, and vanilla extract.
Use an immersion blender to mix this together into a creamy substance.
Powder erythritol in a spice grinder, then add erythritol, stevia, and cocoa powder to the avocado mixture.
Mix everything together well, then chop bakers chocolate and add into the bowl.
Leave bowl in the fridge for 6-12 hours, then about 20 minutes before you're ready to serve, add mixture to ice cream machine as per manufacturers instructions.