Mix coconut milk in a high speed blender or Nutribullet. Refrigerate.
Bring almond milk to a simmer in a small saucepan over medium-high heat. Add in grated chocolate, vanilla extract, and stevia. Reduce the heat to medium-low. Simmer for 10 minutes, whisking constantly until chocolate is melted and almond milk is frothy.
Top with whipped coconut milk and grated chocolate.