In a small to medium pot, warm the almond milk until it simmers just slightly.
Stir in the erythritol (or any low carb sweetener you prefer to use), the cinnamon and vanilla and stir well to combine. Bring back to a simmer.
while that simmers, put the coconut cream/fat into a mixing bowl with the sweetener and vanilla extract. Blend with a beater until the fat is whipped into whipped cream.
Pour the hot chocolate into a mug and top with the whipped cream.