Heat heavy whipping cream, sweetener, vanilla, salt and xanthan just until it starts to boil.
Remove the pan from the heat and let it site for a minute. Add the egg yolks and whisk them in to combine.
Return the pan to the stove and set the heat to low/medium.
Using a silicone spatula, continually stir the mixture until it begins to thicken. The mixture is thick enough when it coats the spatula without dripping off.
Remove the pan from the heat. Pour pudding into serving cups or jars
Notes
Switch up the flavors with different extracts like pumpkin spice extract or coconut extract for a fun twist.