Place first 5 ingredient in a high speed blender (milk through salt) and puree until smooth. Add ice and continue blending until you've reached desired consistency.
Pour into four glasses and garnish with whipped cream and chocolate shavings to serve.
Video
Notes
For a little kick, I love adding warm spices like cinnamon, cayenne or nutmeg! It's also delicious with vanilla ice cream if you want to make it a little more indulgent.