In a medium saucepan combine the sweetener, xanthan gum, pumpkin spice, and salt with a whisk until smooth.
Add pumpkin puree, yolks, and vanilla extract to the dry ingredients.
Stir until thoroughly combined.
Gradually add in the whipping cream, whisking between each addition.
Once all of the cream has been added, bring the mixture to medium heat.
Heat the pudding mixture, whisking constantly until the mixture thickens, about 4-7 minutes.
When thickened, remove from heat and transfer into a bowl.