In a small bowl, whisk the sweetener, cornstarch, cinnamon, pumpkin pie spice and salt.
In a large saucepan, whisk the coconut cream, milk, pumpkin puree, syrup and vanilla together over medium heat.
Whisk in the dry ingredients and bring to a boil, whisking frequently.
As soon as the pudding starts to boil, whisk steadily for 2 minutes. (you should see thick bubbles popping)
Remove from the heat and stir in the butter.
Divide between 6 (4 ounce) dessert dishes.
Chill for at least 2 hours or overnight, covered in a refrigerator.
Served cold, garnished with whipped cream and sprinkled with cinnamon.