In a medium saucepan, combine the water and milk, and place over medium heat. Heat until it begins to lightly simmer, but do not let it boil.
Once heated, add the semisweet chocolate chips and cocoa powder to the saucepan. Whisk continually until the chocolate has completely melted and the mixture is smooth.
Stir in the ground ginger, cinnamon, nutmeg, and brown sugar. Mix until all spices are well incorporated and the sugar has dissolved.
Remove from heat and add the vanilla extract, stirring well to combine.
Pour the gingerbread hot chocolate into mugs and top generously with whipped cream.
Sprinkle crushed gingerbread cookies on top for extra texture and flavor.
Notes
Serve the hot chocolate in festive mugs, and consider adding a cinnamon stick or a slice of gingerbread as a charming garnish.