Heat the milk and water in a small saucepan. When it begins to simmer, lower the heat and whisk in the agave syrup, white sugar, ginger, cocoa and sea salt until fully combined.
When the hot chocolate is at your desired temperature, remove from heat and stir in the vanilla.
Pour into a mug and top with whipped cream.
Notes
I like to shred a little chocolate on top of the whipped cream, but that is totally optional.